Technical Service Bulletin (TSB) re exhaust metallic vibration

[joeysSS]

Taking mine in this morning (just got it last Thursday) for the same thing. (2nd time its been in there for this) in the last 5 days. I am SO glad I have found this web site. I am going to have my hubby put a new exhaust on it anyays. I think it's sounds kinda girlie for an SS. This coming from a girl I put GM GFX on it and I thought maybe it was doing it because of that? There is also a bump, possibly a bolt that you can feel that sticks out on the rear passenger corner bumper. I think they scabbed on my GFX too fast because I wanted my car NOW!

[joeysSS]

Originally Posted by dmo

I took my camaro in to be serviced at the dealer for a dent (completely gone now ) and a vibrational noise when I was in low RPM's of any gear. The mechanic said he couldn't hear it but I insisted it was there. So the mechanic did some research and found a Technical Service Bulletin (TSB) that described exactly what I said. It turned out the baffles in the exhaust separate and vibrate creating a tinny noise. So now my exhaust is being replaced from the catalytic converter back and its all under warranty. Just wanted to post this in case anyone else had the same problem and didn't know what the hell it was.

Do you have the TSB #. I'm taking mine in this morning. Had it for 5 days, 2nd time its been in for this. Ughhhhh. Glad I found this. Thanks!

[cardsfan09]

I had the rattlers, and asked the service manager to see if they could put the GMPP mufflers on instead of the stock mufflers, cost me $60 extra and it fixed the rattle and I'm getting a little better low end torque and she just breathes easier throughout the RPM band, another bonus is that I'm now averaging 25.6 MPG !!!!!

[Chevrolet Customer Svc]

cardsfan09,
I'm glad to hear everything worked out!

Chevrolet Customer Service,
Justin

Originally Posted by cardsfan09

I had the rattlers, and asked the service manager to see if they could put the GMPP mufflers on instead of the stock mufflers, cost me $60 extra and it fixed the rattle and I'm getting a little better low end torque and she just breathes easier throughout the RPM band, another bonus is that I'm now averaging 25.6 MPG !!!!!

[SSx2JAMES]

so what does it mean if u hv deleted ur mufflers and u still hv that rattling noise when ur first driving away. thx for the info.

[swizz]

Took my car to Chevy of Wilton, CT today to do a 50k service. Had this issue going on for over 20+30k miles. Another dealer which will go nameless said that it was normal etc. This sound was bad and consistent in 2000rpm range. Wilton found the TSB and after some discussions are goodwilling it for me since I fell just outside warranty mileage wise. I'm not one to ever give shout out to a dealer but I was very happy with how things were explained to me and was given options etc. So shoutout to Chevy of Wilton and if anyone from GM corporate is reading this... I dunno... they need a reward of some kind.

[Chevrolet Customer Svc]

Glad to hear you had a good time with Chevy of Wilton swizz. We're happy to hear about the good times some of you have with your dealers.

Jeff Morris, Chevrolet Customer Service

[Hitman31]

Has anyone had this problem on a 2011 model? I am hearing a noise under the car that sounds like a little fuel dump with a metal noise too. I don't know how better to discribe it. I have taken it to the dealership and they can not duplicate the noise...like going to the doctor and you feel better in the waiting room...

[bmbbl be]

is there a TSB on the valve covers baffle of a L99?

[Onyx]

The TSB# is 2756752

[Ntimad8rs]

Of course they have to see it to believe it. I have a 2010 model built before #50,000. I only have 22.3K on it and will be printing out the TSB and placing it in the passenger seat when I drop it off. That noise is a whole lot worse on the outside. It sounds like a chevette!!! Argh!

[Chevrolet Customer Svc]

Originally Posted by Ntimad8rs

Of course they have to see it to believe it. I have a 2010 model built before #50,000. I only have 22.3K on it and will be printing out the TSB and placing it in the passenger seat when I drop it off. That noise is a whole lot worse on the outside. It sounds like a chevette!!! Argh!

Please let us know how your service appointment goes. We are here is you have any questions or comments.

Brandon
Chevrolet Customer Service

[Ntimad8rs]

Brandon,

Ken Dixon Chevrolet, Waldorf, Md was very professional and stated that it would take up to 7 business days to get the parts. They had it back to me in 5 days, no charge and sounds like normal again. Thanks!

[SSeric]

Originally Posted by Chevrolet Customer Svc

Please let us know how your service appointment goes. We are here is you have any questions or comments.

Brandon
Chevrolet Customer Service

I'm about to do the same. Need to take mine back to the dealership to readdress an issue that wasn't initially resolved. Early model 2010 with 18k miles.

[jesslz]

I think my car has this issue. I just picked it up last sunday, and noticed the noise. I thought it might be the plate frame rattling, but after reading all the posts this sounds like I might need to have it looked at :(

[Chevrolet Customer Svc]

Originally Posted by jesslz

I think my car has this issue. I just picked it up last sunday, and noticed the noise. I thought it might be the plate frame rattling, but after reading all the posts this sounds like I might need to have it looked at :(

I apologize for the inconveniences you may be experiencing. It would definitely be best to get it diagnosed by the dealership.

Please let us know how the visit goes.

Brandon
Chevrolet Customer Service

[redredrage]

Took my car in at 53k miles had bad exahust rattle. Replaced entire exahust upto headers....... $1500 list price under goodwill..... rattle was coming from lose baffel in passenger side muffler.

[CamaroBC]

I have the same issue but I have a axle back exhaust so whats that mean?

[redredrage]

Originally Posted by CamaroBC

I have the same issue but I have a axle back exhaust so whats that mean?

It means you should have bought an v8

[kgraley]

When I bought my Transformer edition it had the same noise they said it was a broken exhaust baffle and after getting in several that were bent up on the tail pipes they finally replaced it and the noise went away for awhile. After a road trip of 400 miles it came back now they say it is a known problem with the 4-6-8 system and will not fix it. Same problem same noise but after 5 assemblies they say I have to live with it. What the heck over 40 g's and I have to accept it. Not me I'll be back till they fix it.

[Beaukz28]

Broken baffles in the mufflers has been around for years. Not just a Camaro problem. This is what happens when you mass produce. And that TSB has been around for years as well. I have probably done a dozen or so over the last 10 years on all GM's. Sometimes things just break. Overall they have some good long lasting exhaust. I was a Service Manager at a Nissan Dealer for about 2 1/2 years. There exhaust rots and falls off after a few years.

[VTXrider]

I have had this issue forever, took it into the dealer over a year ago and they could not hear the vibration. It has gotten really bad now in every gear low speed acceleration. There is no way they can tell me they don't hear it now! Have to get it in soon because I'm almost our of warranty.

[Chevrolet Customer Svc]

Originally Posted by VTXrider

I have had this issue forever, took it into the dealer over a year ago and they could not hear the vibration. It has gotten really bad now in every gear low speed acceleration. There is no way they can tell me they don't hear it now! Have to get it in soon because I'm almost our of warranty.

Please let us know how your service appointment goes. We are available at your convenience if you have any questions.

Brandon
Chevrolet Customer Service

[VTXrider]

Took it in this morning and they just called to tell me they are ordering the parts. I also found out that they started my warranty the day I singed the papers for my car and not when it was delivered which means my bumper to bumper runs out on the 25th where as I thought I had until the 1 since I was delivered my car on March 1st. The service guy said that the parts would take a week or more to get here and that I had to get the car there immediately otherwise it might not be covered under warranty if I go back after the 25th. That seems strange to me since the problem has now been diagnosed before the warranty expires.

[Chevrolet Customer Svc]

Originally Posted by VTXrider

Took it in this morning and they just called to tell me they are ordering the parts. I also found out that they started my warranty the day I singed the papers for my car and not when it was delivered which means my bumper to bumper runs out on the 25th where as I thought I had until the 1 since I was delivered my car on March 1st. The service guy said that the parts would take a week or more to get here and that I had to get the car there immediately otherwise it might not be covered under warranty if I go back after the 25th. That seems strange to me since the problem has now been diagnosed before the warranty expires.

Let us know how your repair goes. Usually if there is a diagnosis before the warranty expires and they have to wait for the parts to come in, it is still under warranty. We are available if you have any questions.

Brandon
Chevrolet Customer Service