Those with LT's, RESET your check engine light!

[mrray13]

That it does, lol!!

[mtcwby]

TAG, did you ever get that code reader from Mac Tools?

[TAG UR IT]

Originally Posted by PieNsky

Oh yes it does! The spedometer needle covers it up!

I was just thinking that same thing! Hilarious!

Originally Posted by mtcwby

TAG, did you ever get that code reader from Mac Tools?

Nope. Didn't need to. After that REALLY cold spell (which probably set off my CEL light), my light went back off and I have not needed to get a code reader which would reset the light. It's been off for quite a while now and has not tripped back other than that one time.

WE ARE GOOD!

I'd suggest living with the light for now. Give the car some time to lean the set up. Reset it after a while and see if it stays off. Maybe it's just going to be a cold weather thing?

Either way, if you are getting codes from your exhaust, which YOU traded out, I'd say save yourself the time from going to the dealer. They won't warranty work on aftermarket parts. You could get stuck with a big bill and a light that won't go off.

[JR-Vette]

Hello,
I received an email from one of your users who was on my forum about 02 simms and asked if I would read this thread and respond.

I have owned, wrenched and raced Corvettes for almost 40 years and spent the last 15 years doing custom tunes as a business and analyzing OBD scanner recordings.

I did read all posts on this thread and lots of conflicts seen.

Not sure if I will hit all issues or questions I saw

1. Claiming not wanting to tune because of warranty becoming invalid, well already did that by putting on illegal smog products that also violate GM warranty so putting on LT headers, canning rear O2s and using illegal high flow CATs MUST have a custom tune done else performance will be hurt, more fuel will be used, smog testing will fail and dealer still can wack your warranty

2. Blowing the money on 3 inch system but reducing to 2 1/2" inlet of muffler just made your 3 inch flow only what the smallest exhaust path allows.

3. You CANNOT turn 02s OFF, you only can turn off their DTC error codes but the hardware in the PCM is still functioning.

4. Getting rid of the rear 02s is bad policy. GM cannot trust the front 02s for startup as exhaust is not constant as to content or temp where the rear 02s are so they are used more then just monitoring CATs.

5. 02 sensors only function from 0 to 1 volt. Shitcan the rear 02s and leaving the wiring pins of harness connector for 02s then can pick up electrical noise (EMI) and fool the PCM and also effect the hardware quad drivers.

6. Rumors or yanking the battery to dancing around the car with your pecker out will not solve the DTC issues.

7. Tests are done on cold start, driving 400 miles non stop does not more then if driving 10 miles, either are still just one valid drive cycle and these on-board tests are done over XX times of valid cold starts.

8. These tests rely on exhaust temps, 02 output values and proper fuel trims.

9. That means what could pass in summer and fail in winter, add elevation, drive style and type of gas used.

10. EPA forcing the use of E10 gas makes all of this worse.

11. GM's software has to require the mandates of EPA/SAE test structure and their design. CATs are located close to engine where exhaust is the hottest.

12. Temp to inlet of CAT is 900 plus where by the time exhaust gets to mufflers that temp is down under 200 degrees.

13. No long tube headers are legal because due to mandates to keep CATs and 02s hot, LT headers are forcing everything downstream from 1 1/2 to 2 feet where exhaust temps are already around 200 degrees cooler.

14. Doing the exhaust mods cause then the 02 sensors to be in a cooler temp, if rear 02s are maintained there is a better chance tests pass but without them and the fact front 02s are reporting a different AFR due to their placement will cause both short and long term fuel trims to be out of wack.

15. People do not take into account is they say well LTFT is now richer, well really the front 02s are seeing LEANER AFR and thus PCM is attempting to adapt by increasing fuel injector pulse width ON longer ( richer) to drive the lean reporting of 02s back closer to zero.

16. Yes PCM will attempt to adapt/relearn but it does NOT make it for perfect AFR, just keeps it within the legal AFR window EPA allows.

17. So you do not get PCM tuned, PCM attempts to adapt somewhat but now PCM is most times flowing more or less fuel and over time causing more carbon buildup, effecting life of front 02s and killing off correct AFR for power enrichment and WOT.

So

A. best to maintain rear 02s.
B. If not then assure pins from harness connector is not picking up EMI
C. No sense adding so called performance mods without custom tuning to marry the mods to the PCM calibration for best performance and also be able to pass EPA I/M 240 smog tests.
D. Assure fuel trims are within +/- 3% average of STFT window.
E. Assure whoever is tuning not only solves the DTCs but assures on-board smog tests are in a complete state and if they cannot do this on the first tune, fine another tuner
F. Resets of DTC error codes, removing battery also then forces ALL smog tests back to a non complete state that not only effects passing EPA tests but also causes the PCM to take away computer time from other engine functions to rerun all those tests until they are in a valid complete state. This means every time you clear codes to turn SES off you forced all tests back to retest mode.
G. E10 gas causes issues as it is leaner and will effect fuel trims to be at times much leaner.
I. Frankly headers themselves gives very little performance gains, the head design of engines today are quite good, it is the tune that makes the gains.
J. Only 1 cylinder at a time needs air/fuel and exhausting thus headers are not by magic increasing cylinder size/volume.

In the end the LT system has effects to exhaust makeup/temp, 02 sensors reporting incorrect AFRs, effects temps of CATs and using 02 sensors with extension wires ruins the required outside reference airflow the O2 sensor requires to function properly and requires custom tuning

[tjbusa]

Thanks for the info offered here, I too am expecting my CEL to come on, hasn't yet, knock on wood. Question, if it does, will my monthly onstar email document such a fault?

[1stGM]

Originally Posted by tjbusa

Thanks for the info offered here, I too am expecting my CEL to come on, hasn't yet, knock on wood. Question, if it does, will my monthly onstar email document such a fault?

I wondered the ame thing until receiving my report 2 days ago. Nothing is mentioned about the CEL I have because of my long tubes....

[JR-Vette]

Originally Posted by tjbusa

Thanks for the info offered here, I too am expecting my CEL to come on, hasn't yet, knock on wood. Question, if it does, will my monthly onstar email document such a fault?

One thing to keep in mind is Onstar also informs GM when errors occur and can flag them that warranty issues can be in question due to mods or removal of smog functions.

[TAG UR IT]

Originally Posted by tjbusa

Thanks for the info offered here, I too am expecting my CEL to come on, hasn't yet, knock on wood. Question, if it does, will my monthly onstar email document such a fault?

You will get a red "Emissions System Urgent" message in red (something along those lines). In the monthly email, it does not say anything about why the emissions needs checking, just that you should immediately take the car to the dealer for a check. I get my monthly email and got that email twice. Remember, my CEL light turned itself off. I did hit my OnStar later after it turned itself off just to check with GM and they did a full report...nothing found. We are good.

Another member had their CEL light turn on and they hit the OnStar button asking the specific codes so they knew what the exact problem was. They were able to get the codes.

Originally Posted by JR-Vette

One thing to keep in mind is Onstar also informs GM when errors occur and can flag them that warranty issues can be in question due to mods or removal of smog functions.

I'm sure OnStar logs evrything....EVERYTHING. But, I highly doubt OnStar sends a special email to GM saying that they need to check someone's car. It just logs it and should it need to be referenced, the info is there. But, I'm sure that happens with ALL cars that have OnStar. ...just another tool GM has to protect itself.

[TAG UR IT]

Originally Posted by JR-Vette

I have owned, wrenched and raced Corvettes for almost 40 years and spent the last 15 years doing custom tunes as a business and analyzing OBD scanner recordings.

1. Claiming not wanting to tune because of warranty becoming invalid, well already did that by putting on illegal smog products that also violate GM warranty so putting on LT headers, canning rear O2s and using illegal high flow CATs MUST have a custom tune done else performance will be hurt, more fuel will be used, smog testing will fail and dealer still can wack your warranty.
No, adding LT's will not void warranty. I know what GM says about "removing cats and moving or removing O2 sensors, turning them off, etc" but simply adding LT's will not void a warranty. What if LT's have O2 sensors added in the same location as the factory system? Now, removing cats altogether, sure...it's not legal. I'll agree to that. I'll also agree that canning the rear O2's will void warranty. But, simply adding LT's and high flow cats (with all proper O2 sensors in place) will not. If this is the case, Tom Henry Racing, my dealer shop foreman, service tech, and several others (including two people from GM) all misinformed me and led me astray (along with countless, COUNTLESS others).

I respectfully disagree. "MUST?" No. Recommended? 100% agree. If I MUST have a tune with my LT's and CAI, my car would not be running. However, it's running just fine. Sure, I could get more out of the entire combination (AND I WOULD LOVE TO!!!), but I don't HAVE to. Doing this will surely void the warranty. I've had a set up similar to this for 7 years...done plenty of warranty work, and never had issues. Then again, I've never had issues because of an intake or exhaust. Sure, I've had exhaust issues, but the repairs were paid for out of pocket because obviously GM does not warranty aftermarket (outside GM) parts.

No smog testing in Texas. So, no issue there. However, I was told that the Stainless set up I have would pass smog testing. Might want to check with them on that.


2. Blowing the money on 3 inch system but reducing to 2 1/2" inlet of muffler just made your 3 inch flow only what the smallest exhaust path allows.
I highly doubt that having one foot of 2 1/2 straight through pipes on either side is going to reduce that much air flow. I wouldn't go to the extreme of calling it "blowing the money." Besides, isn't back pressure somewhat necessary?
3. You CANNOT turn 02s OFF, you only can turn off their DTC error codes but the hardware in the PCM is still functioning.
yep
4. Getting rid of the rear 02s is bad policy. GM cannot trust the front 02s for startup as exhaust is not constant as to content or temp where the rear 02s are so they are used more then just monitoring CATs.
And you will void your warranty if you mess with any of the O2 sensors.

6. Rumors or yanking the battery to dancing around the car with your pecker out will not solve the DTC issues.
Uh oh...all naked late night dancing in the garage for nothing?

7. Tests are done on cold start, driving 400 miles non stop does not more then if driving 10 miles, either are still just one valid drive cycle and these on-board tests are done over XX times of valid cold starts.
Yep. I was mentioning the starts on one of my initial posts here. I was told by two different people (one ex GM employee and another who has the connections) that it was on 50 starts. If this isn't the exact #, ...ok. Basically still the same.

9. That means what could pass in summer and fail in winter, add elevation, drive style and type of gas used.
I was told this too.
10. EPA forcing the use of E10 gas makes all of this worse.
never looked into this.

13. No long tube headers are legal because due to mandates to keep CATs and 02s hot, LT headers are forcing everything downstream from 1 1/2 to 2 feet where exhaust temps are already around 200 degrees cooler.
....mmmmmm ..back to previous reply. And I suppose all aftermarket parts companies are selling illegal products which you are doing tunes on?...so people can take their every day drivers out on the public roadways? So, if people are adding illegal devices to their cars, and then they bring them to you, .....you are aiding these people in illegal modifications to their cars when you tune the car to their intakes, exhausts, cams, etc for use on public roadways? Are you assisting in illegal activity?

No. You are not. Because all LT's are not illegal. If they were, people wouldn't be passing inspections....like me....when I took my car in and had about 6 people checking it out, looking under the hood, seeing the LT's, etc etc. They might be illegal in your state....but...
14. Doing the exhaust mods cause then the 02 sensors to be in a cooler temp, if rear 02s are maintained there is a better chance tests pass but without them and the fact front 02s are reporting a different AFR due to their placement will cause both short and long term fuel trims to be out of wack.
And if mine were out of wack, I'd be getting my CEL light, right? Because it did come on...but turned itself back off. No problems...no issues...
15. People do not take into account is they say well LTFT is now richer, well really the front 02s are seeing LEANER AFR and thus PCM is attempting to adapt by increasing fuel injector pulse width ON longer ( richer) to drive the lean reporting of 02s back closer to zero.

16. Yes PCM will attempt to adapt/relearn but it does NOT make it for perfect AFR, just keeps it within the legal AFR window EPA allows.
Which is why a tune is recommended.
17. So you do not get PCM tuned, PCM attempts to adapt somewhat but now PCM is most times flowing more or less fuel and over time causing more carbon buildup, effecting life of front 02s and killing off correct AFR for power enrichment and WOT.
My WOT ain't that bad...lol. Yeah, yeah...I know it could be better... I could probaby get 10 to 15 more hp/tq. But, adios warranty.

Thank you for the info.

On one note, you are in the business of doing tunes. I'm not taking anything away from you...and mean no disrespect. But, when you are in the business of doing tunes for a living, of course you are going to push them. My only point is that it is not required. I KNOW it would be best. But, when tune companies start offering aftermarket warranties with their tunes (that they aren't going to jack up your car and it'll run fine), then I'll look that way.

For now, adding a couple parts to enhance performance without tuning isn't wasting money. Some might think so, but in MY opinion, it's not. I would gather that SLP, ADM, Henessey, LMR, CAI, RotoFab, etc, etc, etc woudn't call their intakes and exhaust products a waste of money either.

[JR-Vette]

I have seen owners who have gotten phone calls from GM asking why they were doing high speeds so yes in general Onstar is not watching everything but they do in fact alarm on certain things Onstar sends to them which includes if DTCs trip they can keep that as record to the VIN # and later seen by dealer in records for that car which includes flags as smog devices tripping codes so a tech looks for the problem that finds mods installed to effect paying out warranty claims.

We find in the Corvette owners first thing they do is unplug or remove Onstar.

Originally Posted by TAG UR IT

I'm sure OnStar logs evrything....EVERYTHING. But, I highly doubt OnStar sends a special email to GM saying that they need to check someone's car. It just logs it and should it need to be referenced, the info is there. But, I'm sure that happens with ALL cars that have OnStar. ...just another tool GM has to protect itself.

[JR-Vette]

For whatever reason the post in reply to mine that has red text I do not see that content when I am doing this reply so I may miss some of their points

As a note my only purpose is to give information that may help others in their thinking of mods and understanding from GM's warranty or EPA requirements or how to maintain good performance with the mods they do and still pass EPA I/M tests.

When people buy a new car they agree to the small print, ie, warranty

Due to high costs GM has had to pay out for warranty work to find the owner had modified GM's design that was certified by the Feds thus GM has clamped down on warranty repairs and any mods done to change the design or violated EPA requirements that GM and owner must abide to

In short there is a bunch of GM content that states they warranty what the car was designed to and what the car's makeup was when that model was tested/certified by the feds

Look at GM published content :

#04-06-04-054A: Info - Non-GM Parts and Accessories (Aftermarket)

Subject: Non-GM Parts and Accessories (Aftermarket)

Models: 2010 and Prior Passenger Cars and Trucks

This bulletin is being updated to add models and model years. Please discard Corporate Bulletin Number 04-06-04-054 (Section 06 - Engine).

The recent rise and expansion of companies selling non-GM parts and accessories has made it necessary to issue this reminder to dealers regarding GM's policy on the use and installation of these components.

When a dealer is performing a repair under the New Vehicle Limited Warranty, they are required to use only genuine GM or GM-approved parts and accessories.
This applies to all warranty repairs, special policy repairs or any repairs paid for by GM. Parts and accessories advertised as being "the same" as parts manufactured by GM, but not sold through GM, do not qualify for use in warranty repairs, special policy repairs or any repairs paid for by GM.

During a warranty repair, if a GM original equipment part is not available through GMSPO, ACDelco® distributors, other GM dealers or approved sources, the dealer is to obtain comparable, non-GM parts and clearly indicate, in detail, on the repair order the circumstances surrounding why non-GM parts were used.

The dealer must give customers written notice, prior to the sale or service, that such parts or accessories are not marketed or warranted by General Motors.

It should also be noted that dealers modifying new vehicles and installing equipment, parts and accessories obtained from sources not authorized by GM are responsible for complying with the National Traffic and Motor Vehicle Safety Act.
Certain non-approved parts or assemblies, installed by the dealer or its agent not authorized by GM, may result in a change to the vehicle's design characteristics and may affect the vehicle's ability to conform to federal law.

Dealers must fully understand that non-GM approved parts may not have been validated, tested or certified for use. This puts the dealer at risk for potential liability in the event of a part or vehicle failure. If a GM part failure occurs as the result of the installation or use on a non-GM approved part, the warranty will not be honored.

A good example of non-authorized modification of vehicles is the result of an ever increasing supply of after market devices available to the customer, which claim to increase the horsepower and torque of the Duramax™ Diesel Engines. These include the addition of, but are not limited to one or more of the following modifications:

• Non CARB legal exhaust systems or designs that effect smog devices.

• Nitrous oxide injection

• Additional modules (black boxes) that connect to the vehicle wiring systems

• Revised engine calibrations downloaded for the engine control module

• Calibration modules which connect to the vehicle diagnostic connector

• Modification to the engine turbocharger waste gate

Although the installation of these devices, or modification of vehicle components, can increase engine horsepower and torque, they may also negatively affect the engine emissions, reliability and/or durability.
In addition, other powertrain components, such as transmissions, universal joints, drive shafts, and front/rear axle components, can be stressed beyond design safety limits by the installation of these devices.

General Motors does not support or endorse the use of devices or modifications that, when installed, increase the engine horsepower and torque.

These same policies apply as they relate to the use of non-GM accessories. Damage or failure from the use or installation of a non-GM accessory will not be covered under warranty.

Failure resulting from the alteration or modification of the vehicle, including the cutting, welding or disconnecting of the vehicle's original equipment parts and components will void the warranty.

Additionally, dealers will NOT be reimbursed or compensated by GM in the event of any legal inquiry at either the local, state or federal level that results from the alteration or modification of a vehicle using non-GM approved parts or accessories.

Dealers should be especially cautious of accessory companies that claim the installation of their product will not void the factory warranty.
Many times these companies have even given direction on how to quickly disassemble the accessory in an attempt to preclude the manufacturer from finding out that is has been installed.

Any suspect repairs should be reviewed by the Area Service Manager (District Service Manager in Canada) for appropriate repair direction.
If it is decided that a goodwill repair is to be made on the vehicle, even with the installation of such non-GM approved components, the customer is to be made aware of General Motors position on this issue and is to sign the appropriate goodwill documentation required by General Motors.

It is imperative for dealers to understand that by installing such devices, they are jeopardizing not only the warranty coverage, but also the performance and reliability of the customer's vehicle.
------------------------------


Date: March 10, 2008

DEALER RESPONSIBILITY FOR NEW VEHICLE ALTERATIONS AND INCOMPLETE VEHICLES

Overview
This letter is to remind all GM Dealers and Saturn Retailers (herein after “Dealers”) in the U.S. of the dealer’s responsibilities and requirements for certifying and labeling a new motor vehicle relative to its compliance with applicable U.S. Federal Motor Vehicle Safety Standards (FMVSS).

This information is relevant to all new vehicles on which further work (manufacturing) is to be performed, or a new vehicle that is “altered” between the time it is certified as a completed vehicle by GM, and the time that it is delivered to the first retail, fleet, or commercial customer.

According to the National Highway Traffic Safety Administration (NHTSA), these regulations are applicable to all new vehicles intended for sale in the U.S. or its territories, which include the District of Columbia, Puerto Rico, the Northern Mariana Islands, Guam, the Virgin Islands and American Samoa.

These U.S. new vehicle safety certification requirements are found in Title 49, Code of Federal Regulations (CFR), Part 567, “Certification”, and Part 568, “Vehicles Manufactured in Two or More Stages — All Incomplete, Intermediate and Final-Stage Manufacturers of Vehicles Manufactured in Two or More Stages.” Many public libraries keep a complete, up-to-date set of the CFR on file. The CFR are also available on the internet at the NHTSA website (www.nhtsa.dot.gov).

Penalties for Violations
The National Traffic and Motor Vehicle Safety Act of 1966 (“Safety Act”) and its amendments (codified as Title 49, United States Code [49 U.S.C.], Chapter 301, Motor Vehicle Safety; available on the internet at the NHTSA website [www.nhtsa.dot.gov], authorize the establishment of the U.S. Federal Motor Vehicle Safety Standards (“FMVSS”) and new vehicle safety certification requirements (reference Title 49, Code of Federal Regulations [49 CFR], Parts 567, 568 and 571), as well as other related regulations.
Penalties for noncompliance are severe. A single violation of the requirements may result in a fine of up to $6,000. For a series of related violations, the maximum possible fine is $16,375,000.

These penalties are applicable to any company that knowingly:
1. Manufactures a vehicle for sale that does not comply with all applicable Motor Vehicle Safety Standards in effect at the time the vehicle was manufactured; or
2. Offers a vehicle for sale that does not comply with all applicable Motor Vehicle Safety Standards in effect at the time the vehicle was manufactured; or
3. Sells a vehicle that does not comply with all applicable Motor Vehicle Safety Standards in effect at the time the vehicle was manufactured; or
4. Fails to provide the proper certification labels and documents for a vehicle, in the manner required; or
5. Installs or provides the required certification labels and documents in spite of knowing that the vehicle does not comply with all applicable Motor Vehicle Safety Standards.

Categories of Work Being Performed
For any dealer modifications involving permanently installed vehicle equipment on completed or incomplete vehicles, whether performed directly by the dealer, or under the contract of the dealer, the dealer should determine which category of work is being performed (see DEFINITIONS section for further details):

Vehicle Alterer: a company that alters a vehicle that was in conformity to the regulations, in such a manner that its stated weight ratings are no longer accurate, or where the company alters the vehicle otherwise than by the addition, substitution or removal of readily attachable components such as mirrors, or tire and rim assemblies, or by minor finishing operations, prior to sale. It is the responsibility of an Alterer to ensure that the “Altered Vehicle” still fully complies with all applicable safety standards and regulations.

 Incomplete Vehicle Manufacturer: a company that manufactures an incomplete vehicle by assembling components (engines, transmissions) none of which, taken separately, constitutes an incomplete vehicle;

 Intermediate Manufacturer: a company, other than an incomplete vehicle manufacturer or final-stage manufacturer, that performs manufacturing operations on an incomplete vehicle;

 Final Stage Manufacturer: a company that performs the manufacturing operations on an incomplete vehicle that turn the incomplete vehicle into a completed vehicle.

Please read each section of this letter to help identify your role and responsibility with respect to the product if you are changing it.

Complete Vehicle
The Safety Act provides in part that a person may not sell vehicles or equipment that do not comply with the applicable safety standards. All General Motors new complete motor vehicles and equipment are engineered, validated and certified to comply with these federal requirements prior to the sale and delivery of such new vehicles to your dealership (“Complete Vehicles”). Each COMPLETE vehicle leaves the GM assembly plant with a COMPLETED VEHICLE SAFETY CERTIFICATION LABEL affixed to the rear of the driver’s door, or in some cases the driver’s B-pillar.
This label is permanently affixed and provides General Motors (and /or its affiliates) as the manufacturer, the date of manufacture, the vehicle identification number (VIN), vehicle type, GAWR, GVWR, as well as the “certification statement” that the vehicle conforms to all applicable FMVSS requirements in effect on the date of the vehicle’s manufacture, at the time the vehicle left the assembly plant. Unless such a vehicle is “altered” prior to being sold, no further certification is required.

Altered Vehicle
Given the market place and the consumer demands to personalize vehicles, the purpose of this section is to highlight a few of the existing General Motors policies and procedures related to the alteration of new vehicles by dealers prior to first sale, and to remind the dealer of certain requirements and federal statutes that apply to the sale of new vehicles by manufacturers and dealers.

Some dealers are altering new vehicles and installing equipment, parts and accessories obtained from sources not authorized by General Motors. Please remember that the dealership is solely responsible for any such changes, and as explained above, the dealership selling these vehicles is responsible for making sure such vehicles still comply with the Safety Act and other applicable legal requirements.

Certain non-approved parts or assemblies, installed by the dealer or its agent not authorized by General Motors, may result in a change to the vehicle’s design characteristics and may affect the vehicle’s ability to conform to federal law in the areas of braking, tire/wheel load restrictions, ground clearances, pass-by noise, fuel economy, and emissions, just to mention a few.

As required by the Safety Act, and according to the FMVSS Regulations, if a company alters a vehicle, other than by the addition, substitution or removal of readily attachable components or by minor finishing operations, the company must ensure that the compliance label and any information labels remain on the vehicle, certify that the vehicle conforms to all applicable standards with respect to the work carried out by the company, and apply an “ALTERED” vehicle label on the vehicle. Any corporation or individual found to be contravening the Safety Act is subject to potential fines and/or imprisonment (as referenced above).

Additionally, as provided in Article 5.1.1 of the GM Dealer Sales and Service Agreement ("Dealer Agreement"), if a dealer modifies (alters) or sells a modified (altered) new Motor Vehicle, or installs any equipment, accessory, or part not supplied by General Motors, the dealer must disclose this fact on the purchase order and bill of sale, indicating that the modification, equipment, accessory or part is not warranted by General Motors. With respect to vehicle repairs, Article 7.2 of the Dealer Agreement provides that dealer will only use genuine GM or GM approved Parts and Accessories in performing warranty repairs, special policy repairs, and any other repairs paid for by General Motors. This is also addressed in the GM Service Policies and Procedures Manual, in section 1.2.4 (e). All of these existing procedures are in place to ensure the safety and satisfaction of our customers.

Incomplete Vehicle
These are traditionally provided to support the commercial and fleet customers with Chassis Cab/Incomplete Vehicles, Cargo Vans, Cutaway Vans, and specific Vans used for customization, just to mention a few. This section relates to work done on INCOMPLETE vehicles by dealers/manufacturers and outlines the requirements governing vehicles manufactured in two or more stages in order to ensure that once completed, the vehicles will conform to all applicable regulatory requirements (FMVSS).

Each INCOMPLETE vehicle is supplied from the GM Assembly Plant with a federally mandated INCOMPLETE VEHICLE DOCUMENT (IVD), which specifies the safety standards that are applicable to that INCOMPLETE vehicle, and to what extent the INCOMPLETE vehicle complies with those standards. The IVD lists the VIN, the applicable GVWR and GAWRs, and corresponding tire and rim information. This information must be entered on the INTERMEDIATE MANUFACTURER’S INFORMATION LABEL (if applicable) and the FINAL-STAGE MANUFACTURER’S VEHICLE SAFETY CERTIFICATION LABEL when the vehicle is completed, assuming that there have been no changes to the applicable components or additions to the vehicle that changed any GAWR or GVWR values.

All the information contained within the IVD document, as provided by GM, applies only to the INCOMPLETE VEHICLE as it left the GM Assembly Plant. The IVD must remain with INCOMPLETE VEHICLE (so that it is available to subsequent manufacturers) until the FINAL-STAGE MANUFACTURER affixes an appropriate VEHICLE SAFETY CERTIFICATION LABEL and should retain the original IVD document its files. If applicable, the INTERMEDIATE MANUFACTURER should make and keep a copy of the IVD document for its files.

Each INCOMPLETE vehicle leaves the GM assembly plant with an INCOMPLETE VEHICLE INFORMATION LABEL affixed to the rear of the driver’s door, or in some cases the driver’s B-pillar. This label is permanently affixed and provides GM as the INCOMPLETE VEHICLE MANUFACTURER, the date of its manufacture, the vehicle identification number (VIN), vehicle type is INC VEH, and the GAWR and GVWRs of the INCOMPLETE VEHICLE. There is no “certification statement” by GM included on this label. This label must not be removed or covered up at any time during the vehicle safety certification process.

Final Stage Manufacturer
GM Dealers ordering INCOMPLETE VEHICLES from GM will be considered the FINAL-STAGE MANUFACTURER of record, whether the vehicle is shipped directly to the dealership or “drop shipped” to a different location at the request of the dealer. The dealer must certify that the COMPLETED VEHICLE conforms to all applicable safety and federal requirements BEFORE the vehicle can be delivered to the first retail or fleet customer. If the dealer is having the work performed, then these requirements need to be passed along to their manufacturer responsible as the FINAL-STAGE MANUFACTURER.

Part of the certification includes affixing to the vehicle a FINAL-STAGE MANUFACTURER’S VEHICLE SAFETY CERTIFICATION LABEL. All other VEHICLE SAFETY CERTIFICATION LABELS and INFORMATION LABELS previously affixed by other manufacturers must not be obscured by another label or removed from the vehicle. The FINAL-STAGE MANUFACTURER should remove the IVD document and any ADDENDUM(s) documents, if applicable, from the vehicle and retain them in its permanent file.

In summary, the stages of the manufacturing process are the incomplete stage, intermediate-stage (where the vehicle remains incomplete) and the final stage, where the vehicle is completed and certified as complying with all applicable standards. The intermediate-stage may not exist if the next work performed on an incomplete vehicle is done by the final stage manufacturer to complete the vehicle.
The incomplete vehicle manufacturer must affix an information label to each incomplete vehicle. The label is to state the manufacturer’s name, month, and year, when the last manufacturing operation was performed, the vehicle identification number, the maximum GVWR intended for the completed vehicle, and the GAWR intended for each axle.
All intermediate manufacturers that perform work on the same vehicle must also affix an information label which provides the same type of information as well as a statement that it is an intermediate manufacturer. The ratings set out on the label applied by the previous manufacturer must be repeated, if there are no changes to GVWR or GAWR. The intermediate manufacturer must provide revised information on the label if changes occur.
The final-stage manufacturer is responsible for affixing the compliance label to the completed vehicle which provides the required information.
Any dealer who does work on an incomplete vehicle manufactured by General Motors may be considered an intermediate stage manufacturer under these regulations and is responsible for the requirements prescribed by these regulations. Any dealer who completes an incomplete vehicle will be considered a final stage manufacturer under these regulations and is responsible for the requirements prescribed by these regulations.


Government Safety Ratings - “Stars on Cars”
Additionally, 49 C.F.R. 375.301 requires manufacturers of vehicles with a GVWR of 10,000 pounds, or less, to include NHTSA New Car Assessment Program (NCAP) safety ratings in the "Government Safety Ratings" section of the Monroney label.

Known as “Stars on Cars,” NHTSA assigns star ratings based on NCAP test performance conducted on a rolling basis throughout the model year. For vehicles that have not been rated in one or more of the categories, "Not Rated" or "To be Rated" statements are shown in the safety ratings section of the label. Vehicles not subject to the regulation do not have a "Government Safety Ratings" section. Throughout the model year, manufacturers are required to add safety label information to Monroney labels within 30 days of receiving NCAP test results.

The Act prohibits the Monroney label from being removed or altered prior to sale to a consumer and penalties exist. For these reasons, NHTSA requires dealerships that alter covered vehicles to attach a second label adjacent to the Monroney label stating, "This vehicle has been altered. The stated star ratings on the safety label may no longer be applicable."

The rule does not specify the size or form of this label, only that it be placed as close as possible to Monroney labels on automobiles that (1) have been altered by the dealership and (2) have test results posted. Altered vehicles are previously certified completed vehicles that are modified, added to, or altered before the first retail sale or lease in a manner that affects compliance with the FMVSS, the vehicle type, or the weight rating. (See ALTERED VEHICLE section).

Disclosure of Non-GM Products & Services
Finally, this letter is to remind dealers of the importance to ensure that all retail and fleet customers, who purchase products or services, are fully informed when any or all are not supplied, authorized, marketed, or warranted by GM:

According to the Dealer Sales and Service Agreement:

“If dealer modifies or sells a modified new motor vehicle, or installs any equipment, accessory, recycled part or part not supplied by General Motors, or sells any non-General Motors service contract for a motor vehicle, dealer will disclose this fact on the purchase order and bill of sale, indicating that the modification, equipment, accessory or part is not warranted by General Motors or, in the case of a service contract, the coverage is not provided by General Motors or an affiliate.”

The dealer is required to disclose to the customer any modifications made, or parts and/or accessories installed on the vehicle that are not GM approved. To comply with these obligations, dealers should provide a copy of the DISCLOSURE OF NON-GM PRODUCTS form, to properly disclose any of the above situations for ALTERED or FINAL-STAGE MANUFACTURER vehicles. The disclosure form should be presented to the customer during the sales or service process, signed, and a copy must be kept in the dealer’s sale or service file along with copies of the purchase order and bill of sale.

In those cases where the vehicle alterations/modifications, non-GM parts and/or accessories are warranted by the installer, manufacturer, or upfitter, it is recommended that a copy of the third party warranty be presented to the customer at the time of vehicle sale or with the invoice or repair order.

Please refer to the GM Service Policies and Procedures for additional information, or contact your regional GM Sales or Service representative.


Conclusion
In conclusion, it is vitally important to General Motors and its dealers to continue to build and maintain consumer confidence in our products and services, while meeting all the applicable legal requirements. You are encouraged to seek the advice of your own legal counsel with respect to any incomplete or altered vehicle changes being performed by your dealership.

DEFINITIONS

ADDENDUM - for the purposes of U.S. regulations, means a document that contains the
INTERMEDIATE MANUFACTURER’s name and mailing address and an indication of all changes that should be made to the INCOMPLETE VEHICLE DOCUMENT to reflect changes that the INTERMEDIATE MANUFACTURER made to the INCOMPLETE VEHICLE. The ADDENDUM shall also contain a certification by the INTERMEDIATE MANUFACTURER that the statements contained in the ADDENDUM are accurate as of the date of manufacture by the INTERMEDIATE MANUFACTURER and can be used and relied on by any subsequent INTERMEDIATE MANUFACTURER(S) and the FINAL-STAGE MANUFACTURER as a basis for certification.

ALTERED VEHICLE - for the purposes of U.S. regulations, means a COMPLETED VEHICLE previously certified that has been altered other than by the addition, substitution or removal of readily attachable components, such as mirrors or tire assemblies, or by minor finishing operations such as painting, before the first purchase of the vehicle other than for resale, in such a manner as may affect the conformity of the vehicle with one or more Federal Motor Vehicle Safety Standard(s) or the validity of the vehicle’s stated weight ratings or VEHICLE TYPE classification.

ALTERER - for the proposes of U.S. regulations, means a person who alters by addition,
substitution or removal of components (other than readily attachable components) a certified vehicle before the first sale of the vehicle other than for resale. (Also see ALTERED VEHICLE.)

COMPLETED VEHICLE - for the purposes of U.S. regulations, means a vehicle that requires no further manufacturing operations to perform its intended function.

FINAL-STAGE MANUFACTURER - for the purposes of U.S. regulations, means a person who performs the manufacturing operations on an INCOMPLETE VEHICLE that it becomes a COMPLETED VEHICLE.

GROSS AXLE WEIGHT RATING (GAWR) - means the value specified by a vehicle
manufacturer as the load-carrying capacity of a single axle system (comprised of the axle,
suspension, tires, rims/wheels and other components, such as the frame rails, as
applicable), as measured at the tire-ground interface.

GROSS VEHICLE WEIGHT RATING (GVWR) - means the value (usually the sum of the GAWRs, but not necessarily) specified by a vehicle manufacturer as the loaded weight of a single vehicle, as measured at the tire-ground interface.

INCOMPLETE VEHICLE - for the purposes of U.S. regulations, means an assemblage consisting, at a minimum, of chassis (including the frame) structure, powertrain, steering system, suspension system, and braking system, in the state that those systems are to be part of the COMPLETED VEHICLE, but requires further manufacturing operations to become a COMPLETED VEHICLE.

INCOMPLETE VEHICLE DOCUMENT (IVD) - means a multiple-page document supplied by the INCOMPLETE VEHICLE MANUFACTURER that contains specific statements with regard to the vehicle safety certification status of the INCOMPLETE VEHICLE as it left the control of the INCOMPLETE VEHICLE MANUFACTURER. The IVD is used by INTERMEDIATE and/or FINAL-STAGE MANUFACTURERS during the completion of further certification procedures. The IVD should not be removed from the INCOMPLETE VEHICLE until final certification as a COMPLETED VEHICLE takes place, i.e., the FINAL-STAGE MANUFACTURER should keep the IVD.

INCOMPLETE VEHICLE MANUFACTURER - for the purposes of U.S. regulations, means a person who manufactures an INCOMPLETE VEHICLE by assembling components, none of which, taken separately, constitute an INCOMPLETE VEHICLE.

INFORMATION LABEL - means a label required by U.S. Code of Federal Regulations
Section 49 DFR 567.5. Such labels must be permanently affixed to the passenger cab of applicable vehicles in specific locations (listed later in this bulletin), and must contain specific information, in the English language, lettered in block capital letters and numerals not less than 2.4 millimeters (3/32 of an inch) high, in a color that contrasts with the label background. The labels must be of such construction that they cannot be removed without destroying or defacing them.

INTERMEDIATE MANUFACTURER - for the purposes of U.S. regulations, means a person, other than the INCOMPLETE VEHICLE MANUFACTURER or FINAL-STAGE MANUFACTURER, who performs manufacturing operations on a vehicle manufactured in two or more stages.

VEHICLE SAFETY CERTIFICATION LABEL - means the general term given to all labels used to signify vehicle compliance with the various safety certification requirements of Title 49, Code of Federal Regulations, Parts 567 and 568, in the U.S. Such labels must be permanently affixed to the passenger cab of applicable vehicles in specific locations (listed later in this bulletin), and must contain explicit statements, in the English language, lettered in block capital letters and numerals not less than 2.4 millimeters (3/32 of an inch) high, in a color that contrasts with the label background. The labels must be of such construction that they cannot be removed without destroying or defacing them.

Document ID# 2005633

Subject: Warranty Admin. - Use of Parts and Components (Including Control Module Calibrations) Not Issued Through General Motors #07-00-89-043 - (08/23/2007)

Models: 2008 and Prior GM Passenger Cars and Light/Medium Duty Trucks

General Motors tests and validates the genuine GM parts originally installed on it's vehicles, including the control module calibrations GM issues for use in it's vehicles.
Among the many factors GM considers when validating parts and calibrations for it's vehicles are reliability, durability, safety, emissions, fuel economy, and the effect on other components in the vehicle.

Warranty Coverage
General Motors does not warranty non-GM parts and/or calibrations.
The use of Parts and/or Control Module Calibrations not issued through General Motors will void the warranty coverage for those components that are damaged or otherwise affected by the installation of the non-GM part and/or control module calibration.
The only exception is that non-GM parts labeled "Certified to EPA Standards" are covered by the Federal Emissions Performance Warranty.

New Vehicle Limited Warranty
General Motors Corporation will provide for repairs to the vehicle during the warranty period in accordance with the following terms, conditions, and limitations:

What Is Covered
Warranty Applies
This warranty is for GM vehicles registered and normally operated in Puerto Rico and U.S. Virgin Islands.

Repairs Covered
The warranty covers repairs to correct any vehicle defect related to material or workmanship occurring during the warranty period. Needed repairs will be performed using new or remanufactured parts. See Things You Should Know About the New Vehicle Limited Warranty for further details.

Warranty Period
The warranty period for all coverages begins on the date the vehicle is first delivered or put in use and ends at the expiration of the coverage period.

Bumper-to-Bumper Coverage
The complete vehicle is covered for 3 years or 36,000 miles, whichever comes first, for Chevrolet and Pontiac, and 4 years or 50,000 miles, whichever comes first, for Buick, Cadillac, and Saab, except for other coverages listed here under "What is Covered" and those items listed under "What Is Not Covered" later in this section.

Powertrain Coverage
The powertrain is covered for 5 years or 100,000 miles, whichever comes first, except for other coverages listed here under "What is Covered" and those items listed under "What is Not Covered" later in this section.

Engine: Cylinder head, block, timing gears, timing chain, timing cover, oil pump/oil pump housing, OHC carriers, valve covers, oil pan, seals, gaskets, turbocharger, supercharger and all internal lubricated parts as well as manifolds, flywheel, water pump, harmonic balancer and engine mount. Timing belts are covered until the first scheduled maintenance interval.

Transmission/Transaxle/Transfer Case: Case, all internal lubricated parts, torque converter, transfer case, transmission/transaxle mounts, seals, and gaskets.

Drive Systems: Final drive housing, all internal lubricated parts, axle shafts and bearings, constant velocity joints, axle housing, propeller shafts, universal joints, wheel bearings, locking hubs, front differential actuator, supports, front and rear hub bearings, seals and gaskets.

Tire Coverage
The tires supplied with your vehicle are covered for defects in material or workmanship under the Bumper-to-Bumper coverage. Any tire replaced will continue to be covered for the remaining portion of the New Vehicle Limited Warranty.

Following expiration of the Bumper-to-Bumper coverage, tires may continue to be covered under the tire manufacturer's warranty. Review the tire manufacturer's warranty booklet or consult the tire manufacturer distributor for specific details.

Accessory Coverages
All GM accessories and parts sold by GM and permanently installed on a GM vehicle prior to delivery will be covered under the provisions of the New Vehicle Limited Warranty. In the event GM accessories are installed after vehicle delivery, or are replaced under the new vehicle warranty, they will be covered, parts and labor, for the balance of the vehicle warranty, but in no event less than 12 months/12,000 miles. This coverage is only effective for GM accessories permanently installed by a GM dealer or an associated GM-approved Accessory Distributor/Installer (ADI).

GM accessories sold over-the-counter, or those not requiring installation, will continue to receive the standard GM Dealer Parts Warranty of 12 months from the date of purchase, parts only.

GM Licensed Accessories are covered under the accessory-specific manufacturer's warranty and are not warranted by GM or its dealers.

Notice: This warranty excludes:Any communications device that becomes unusable or unable to function as intended due to unavailability of compatible wireless service from the wireless communication carrier that provides service for the OnStar® system.

Sheet Metal Coverage
Sheet metal panels are covered against corrosion and rust-through as follows:

Corrosion: Body sheet metal panels are covered against rust under the Bumper-to-Bumper coverage.

Rust-Through: Any body sheet metal panel that rusts through, an actual hole in the sheet metal, is covered for up to 6 years or 100,000 miles, whichever comes first; 6 years/unlimited miles for Buick, Cadillac, and Saab.

Important: Cosmetic or surface corrosion, resulting from stone chips or scratches in the paint, for example, is not included in sheet metal coverage.

Towing
Towing is covered to the nearest GM dealer if your vehicle cannot be driven because of a warranted defect.

No Charge
Warranty repairs, including towing, parts, and labor, will be made at no charge.

Obtaining Repairs
To obtain warranty repairs, take the vehicle to a GM dealer within the warranty period and request the needed repairs. A reasonable time must be allowed for the dealer to perform necessary repairs.

What Is Not Covered

Tire Damage or Wear
Normal tire wear or wear-out is not covered. Damage to the tire such as punctures, cuts, snags, and breaks resulting from pothole impact, curb impact, or from other objects is not covered.
Also, damage from improper inflation, high speed spinning, as when stuck in mud or snow, tire chains, racing, competition, improper mounting or demounting, misuse, negligence, alteration, or misapplication is not covered.

Damage Due to Accident, Misuse, or Alteration
Damage caused as the result of any of the following is not covered:

• Collision, fire, theft, freezing, vandalism, riot, explosion, or objects striking the vehicle.

• Misuse of the vehicle such as driving over curbs, overloading, racing, or other competition.
Proper vehicle use is discussed in the Owner Manual.

• Alteration or modification to the vehicle including the body, chassis, or components after final assembly by General Motors.

• Coverages do not apply if the odometer has been disconnected, its reading has been altered, or mileage cannot be determined.

Damage or Corrosion Due to Environment, Chemical Treatments, or Aftermarket Products
Damage caused by airborne fallout, salt from sea air, salt or other materials used to control road conditions, chemicals, tree sap, stones, hail, earthquake, water or flood, windstorm, lightning, the application of chemicals or sealants subsequent to manufacture, is not covered. See "Chemical Paint Spotting" under Things You Should Know About the New Vehicle Limited Warranty for more details.

Damage Due to Contaminated or Poor Quality Fuel
Poor fuel quality or incorrect fuel may cause driveability problems such as hesitation, lack of power, stall, or no start. It may also render gauges inoperable or degrade functionality for components such as spark plugs, oxygen sensors, and the catalytic converter. Damage from poor fuel quality, water contamination, incorrect diesel fuel or gasoline may not be covered.

It is recommended that gasoline meet specifications which were developed by automobile manufacturers around the world and contained in the World-Wide Fuel Charter which is available from the Alliance of Automobile Manufacturers at http://www.autoalliance.org/fuel_charter.htm. Gasoline meeting these specifications could provide improved driveability and emission control system performance compared to other gasoline.

Damage Due to Insufficient or Improper Maintenance
Damage caused by failure to follow the recommended Maintenance Schedule intervals and/or failure to use or maintain fluids, fuel, lubricants, or refrigerants recommended in the Owner Manual is not covered.

Important: This warranty is void on vehicles currently or previously titled as salvaged, scrapped, junked, or totaled.

Maintenance
All vehicles require periodic maintenance. Maintenance services, such as those detailed in the Owner Manual or Maintenance publications are at the owner's expense. Vehicle lubrication, cleaning, or polishing as well as items requiring replacement or repair due to vehicle use, wear, or exposure are not covered. Items such as:

Items such as:

• Audio system cleaning

• Brake pads and linings

• Clutch linings

• Coolants and fluids

• Filters

• Keyless entry batteries *

• Limited slip rear axle service

• Tire rotation

• Wheel alignment/balance **

• Wiper inserts

are covered only when replacement or repair is the result of a defect in material or workmanship.

* Consumable battery covered up to 12 months only.

** Maintenance items after 7,500 miles.

Failure or damage of one component due to vehicle use, wear, exposure or lack of maintenance of another component is not covered.

Extra Expenses
Economic loss or extra expense is not covered.

Examples include:

• Inconvenience

• Lodging, meals, or other travel costs

• Loss of vehicle use

• Payment for loss of time or pay

• State or local taxes required on warranty repairs

• Storage

Other Terms: This warranty gives you specific legal rights and you may also have other rights.


General Motors does not authorize any person to create for it any other obligation or liability in connection with these vehicles. Any implied warranty of merchantability or fitness for a particular purpose applicable to this vehicle is limited in duration to the duration of this written warranty. Performance of repairs and needed adjustments is the exclusive remedy under this written warranty or any implied warranty. General Motors shall not be liable for incidental or consequential damages, such as, but not limited to, lost wages or vehicle rental expenses, resulting from breach of this written warranty or any implied warranty. *

* Some states do not allow limitations on how long an implied warranty will last or the exclusion or limitation of incidental or consequential damages, so the above limitations or exclusions may not apply to you.

Originally Posted by TAG UR IT

Thank you for the info.

On one note, you are in the business of doing tunes. I'm not taking anything away from you...and mean no disrespect. But, when you are in the business of doing tunes for a living, of course you are going to push them. My only point is that it is not required. I KNOW it would be best. But, when tune companies start offering aftermarket warranties with their tunes (that they aren't going to jack up your car and it'll run fine), then I'll look that way.

For now, adding a couple parts to enhance performance without tuning isn't wasting money. Some might think so, but in MY opinion, it's not. I would gather that SLP, ADM, Henessey, LMR, CAI, RotoFab, etc, etc, etc woudn't call their intakes and exhaust products a waste of money either.

[JR-Vette]

To answer more of the reply that had red text.

1. Try and find any LONG tube headers that have a CARB label, you will not

2. Per cylinder temps are between 300-400 degrees, the collector or point of 02 sensors are about 900 degrees. Cats and O2 sensors are designed to be at XX amount of high heat. The cooler the exhaust is the more effect to those smog parts.

3. Pre let's say 2005 cars had to have smog pumps (AIR) to induce the CATs to get hotter faster ( inverse makeup of outbound exhaust of CAT)
Today it is tougher in that the CATS are moved up closer to the exhaust manifolds to assure CATS and 02s are in hotter exhaust temps.
No LONG tube headers where the O2 needs to be at the collector ( additive of 4 primary exhaust temps) would be legal to EPA or GM's warranty design.

4. If temp at collector is 900 degrees and the fact 02 sensors have heaters to shows for them to work correctly high temp is needed. Hence if exhaust temp to mufflers just 6 feet further downstream is already below 200 degrees you can see how long tube headers moving 02 and CATs just 1 1/2 feet downstream how much cooler the temp is and the effects of exhaust makeup and causing 02s to report a totally different 02 content.

GM clearly says their design will not be changed, if so it no longer meets the design they warranty and the fact EPA requires smog parts to be at a set distance where the smog parts were designed to be functional

GM states that owner agrees to :

Document ID# 1847517

Emission Control Systems Warranty
This section outlines the Emission Warranty that GM provides for your vehicle, in accordance with the U.S. Federal Clean Air Act. Defects in material or workmanship in GM emission parts may also be covered by the "Bumper-to-Bumper" coverage. There may be additional coverage on GM diesel engine vehicles. In any case, the warranty with the broadest coverage applies.

What Is Covered
The parts covered under the Emission Control Systems warranties are listed under "Emission Warranty Parts List" later in this section.

What Is Not Covered

The Emission Control Systems warranties obligations do not apply to conditions resulting from tampering, abuse, neglect, or improper maintenance; or any other items listed under "What is not Covered" in the New Vehicle Warranty. The "Other Terms" presented in the New Vehicle Limited Warranty also apply to the emission related warranties.

Warranty Period
Both the Emission Defect warranty and the Emission Performance warranty described below begin on the date the vehicle is first delivered or put into use and continue for a period of 2 years or 24,000 miles, whichever occurs first. If a catalytic converter or powertrain control module is found to be defective under either or these warranties, those parts are warranted for 8 years or 80,000 miles.

Emission Control Systems Warranties
Emission Defect Warranty
GM warrants to the owner the following:

• The vehicle was designed, built, and equipped so as to conform at the time of sale with the applicable regulations of the Federal Environmental Protection Agency (EPA).

• The vehicle is free from defects in material and workmanship which cause the vehicle to fail to conform with those regulations during the emission warranty period.

Emission related defects in the genuine GM parts listed under the Emission Warranty Parts List, including related diagnostic costs, parts and labor are covered by this warranty.

Emission Performance Warranty
Some states and/or local jurisdictions have established periodic vehicle Inspection and Maintenance (I/M) programs to encourage proper maintenance of your vehicle. If an EPA-approved I/M program is enforced in your area, you may also be eligible for Emission Performance Warranty coverage when all of the following conditions are met:

• The vehicle has been maintained and operated in accordance with the instructions for proper maintenance and use set forth in the Owner Manual and the Warranty and Maintenance Schedule booklets supplied with your vehicle.

• The vehicle fails an EPA-approved I/M test during the emission warranty period.

• The failure results, or will result, in the owner of the vehicle having to bear a penalty or other sanctions, including the denial of the right to use the vehicle, under local, state, or federal law.

If all of these conditions are met, GM warrants that your dealer will replace, repair, or adjust to GM specifications, at no charge to you, any of the parts listed under the "Emission Warranty Parts List" later in this section, or parts thereof, which may be necessary to cause your vehicle to conform to the applicable emission standards. Non-GM parts labeled "Certified to EPA Standards" are also covered by this warranty.

Emission Warranty Parts List
The parts that may affect your vehicle's emissions are on the following pages. These emission parts are covered under emission warranties as follows:

Powertrain Control System

ABS Control Module

Camshaft Position Actuator

Camshaft Position Actuator Valve

Coolant Level Sensor

Data Link Connector

Electronic Throttle Control (ETC) Motor

Engine Control Module (ECM)

Engine Coolant Temperature Sensor

Fast Idle Solenoid

Flexible Fuel Sensor

Fuel Control Module

Intake Air Temperature Sensor

Malfunction Indicator Lamp

Manifold Absolute Pressure Sensor

Mass Air Flow Sensor

Oil Pressure Sensor (DoD™ only)

Oxygen Sensors

Powertrain Control Module (PCM)

Programmable Read Only Memory (PROM)

Throttle Position Sensor

Throttle Position Switch

Vehicle Control Module (VCM)

Vehicle Speed Sensor

Wheel Speed Sensor

Transmission Controls and Torque Management

GMLAN (CAN) Communications Circuit

Manual Transmission Clutch Switch

PARK(P)/NEUTRAL(N) Switch

Torque Converter Clutch Solenoids

Torque Converter Clutch Switch

Transmission Control Module

Transmission Fluid Temperature Sensor

Transmission Gear Selection Switch (Diesel)

Transmission Internal Mode Switch

Transmission Pressure Solenoids

Transmission Pressure Switches

Transmission Shift Solenoids

Transmission Speed Sensors

Fuel Management System

Common Rail Assembly (6.6L DURAMAX® Diesel)

Diesel Fuel Injection Pump

Diesel Fuel Injection Pump Timing Adjust

Diesel Fuel Injector Control Module - EDU (6.6L DURAMAX® Diesel)

Diesel Fuel Temperature Sensor

Direct Fuel Injector Assembly (6.6L DURAMAX® Diesel)

Fuel Injector

Fuel Pressure Regulator

Fuel Rail Assembly

Fuel Rail Pressure Sensor (6.6L DURAMAX® Diesel)

Function Block (6.6L DURAMAX® Diesel)

Air Management System

Air Cleaner

Air Cleaner Diaphragm Motor

Air Cleaner Resonator

Air Cleaner Temperature Compensator Valve

Air Intake Ducts

Charge Air Control Actuator

Charge Air Control Solenoid Valve

Charge Air Control Valve

Charge Air Cooler (6.6L DURAMAX® Diesel)

Charge Air Cooler Fan

Idle Air Control Valve

Idle Speed Control Motor

Intake Manifold

Intake Manifold Gasket

Intake Manifold Gasket (Uplander, Montana SV6, and DURAMAX® Diesel)

Intake Manifold Heater

Intake Manifold Tuning Valve

Intake Manifold Tuning Valve Relay

Supercharger Assembly

Throttle Body (Replacement Only)

Throttle Body Heater

Throttle Closing Dashpot

Turbocharger Assembly

Turbocharger Boost Sensor (6.6L DURAMAX® Diesel)

Turbocharger Oil Separator

Turbocharger Thermo Purge Switch

Vacuum Pump (6.6L DURAMAX® Diesel)

Ignition System

Camshaft Position Sensor(s)

Crankshaft Position Sensor(s)

Distributor

Distributor Cap

Distributor Pick Up Coil

Distributor Rotor

Glow Plug(s) (Diesel)

Glow Plug Controller (Diesel)

Glow Plug Relay (Diesel)

Ignition Coil(s)

Ignition Control Module

Ignition Timing Adjustment

Knock Sensor

Spark Plug Wires

Spark Plugs

Catalytic Converter System

Catalytic Converter(s) and Muffler if attached as assembly

Diesel Exhaust Temperature and Pressure Sensors

Diesel Particulate Filter (DPF)

Exhaust Manifold (7/70 Only Corvette 7.0L, Equinox, Torrent, Uplander, Cadillac DTS 4.6L, (Impala, Grand Prix 5.3L right side) and C/K Trucks < 14,000 GVWR 8.1L)

Exhaust Manifold with Catalytic Converter attached as assembly

Exhaust Manifold Gasket

Exhaust Pipes and/or Mufflers (when located between catalytic converters and exhaust manifold)

Positive Crankcase Ventilation System

Oil Filler Cap

PCV Filter

PCV Oil Separator

PCV Valve

Exhaust Gas Recirculation System

EGR Feed and Delivery Pipes or Cast-in Passages

EGR Valve

EGR Valve Cooler (6.6L DURAMAX® Diesel)

EGR Vacuum Pump Assembly (6.6L DURAMAX® Diesel)

Secondary Air Injection System

Air Pump

Check Valves

Evaporative Emission Control System (Gasoline Engines)

Canister

Canister Purge Solenoid Valve

Canister Vent Solenoid

Fuel Feed and Return Pipes and Hoses

Fuel Filler Cap

Fuel Level Sensor

Fuel Limiter Vent Valve

Fuel Tank(s)

Fuel Tank Filler Pipe (with restrictor)

Fuel Tank Vacuum or Pressure Sensor

Hybrid

Auxiliary Transmission Pump, Relay, and Circuit

Battery Pack 12V Modules (3)

Battery Pack Current Sensor and Circuit

Brake Pedal Switch (PCM ZAB Switch)

Energy Storage Control Module

GMLAN (CAN) Communications Circuit

Hood Ajar Switch and Circuit

Hybrid Control Module

SGCM Coolant Circuit (fan and fan relay and pump)

Starter Generator Control Module

Wheel Speed Sensor and Circuits (left and right front)

Miscellaneous Items Used with Above Components are Covered

Belts

Boots

Clamps

Connectors

Ducts

Fittings

Gaskets

Grommets

Hoses

Housings

Mounting Hardware

Pipes

Pulleys

Sealing Devices

Springs

Tubes

Wiring

Parts specified in your maintenance schedule as requiring scheduled replacement are covered up to their first replacement interval or the applicable emission warranty coverage period, whichever comes first. If failure of one of these parts results in failure of another part, both will be covered under the Emission Control System Warranty.

Parts specified in your maintenance schedule that require scheduled replacement are covered up to their first replacement interval or the applicable emission warranty coverage period, whichever comes first. If failure of one of these parts results in failure of another part, both will be covered under the Emission Control System Warranties.

For detailed information concerning specific parts covered by these emission control systems warranties, ask your dealer.

[PieNsky]

Oh man, could you paraphrase this so someone,such as myself,who has ADD will be able to read?
Could some unnamed GM insider chime in on whether long tubes would void a warranty?

[JR-Vette]

High flow CATS are illegal as EPA forces GM to warranty smog parts for 8 years

EPA says then there is zero reason for a car less then 8 years old to have bought any CAT since they would be replaced for FREE within that time frame.

As to GM warranty those high flow CATS violate GM spec's and design

Dealers is what cost GM billions of dollars I knew customers where the dealer put in racing CAMs, superchargers, even tunes and when those cars fail the dealer sneaks the repairs in under warranty when they know the warranty is no longer any good and reason many dealer got shitcanned.

There is no sense to add so called performance mods and then those mods alone cause
A. AFR changes
B. induce engine/exhaust temps
C. effect torque, backpressure and
D induce msifires and engine knock

Yes I used the word MUST as yes do not tune and PCM does LIMITED relearn/adapt but it was never designed to adjust to assure best performance but rather to adjust to attempt to meet EPA requirements.

A difference in a AFR of 13.5:1 to 12.5:1 is a big performance difference for power enrichment or WOT thus why spent $2,000 for total exhaust change claiming 30 HP gains and losing that to a PCM calibration that was designed for a stock exhaust flow/temp.

A well done custom tune will not only marry the mods better to the engine but increase performance another 30 HP, cease the error codes and allow car to pass EPA I/M and even I/M 240 tests ( headers, etc would fail visual EPA if done)

I get customers all the time that either

1. owner car in a state that did not do smog testing but then attempted to sell car to a owner in another state and seller could not get the car passed now to that states smog rules
2. or New owner buys a car that came from another state but the state new owner is prevents title change or license tags due to car not being able to pass smog so it is one thing to say well the mods do not effect me but it can when selling or new owner not knowing of the mods gets wacked trying to get car titled in his state.


As to exhaust design

take a garden hose, turn water on, watch flow, now slightly step on ANY part of the hose and watch the reduced volume
The smallest diameter effects the total flow

I spent several months designing and complex testing for exhaust for my Corvette
If you have the time read the total contents of this thread

http://www.teamzr1.com/ubbthreads/ub...=2376#Post2376

Consider GM for the Z06 or new ZR1, all 3 inch including the 3 inch inlet of mufflers