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Old 01-05-2013, 02:22 PM   #1
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Service Suspension System

Hi All, I dyno'd my ZL1 last night on a local dynojet and now my "service suspension system" notification won't turn off. Also, the car rides really rough as if the magnetic suspension has been shut off completely. Anyone else have this issue after a few dyno runs?

Dealers are closed today so Monday I will get it checked out. Anything I can try in the meantime or any recommendations?
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Old 01-05-2013, 02:30 PM   #2
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If you have a scan tool, check to see if there are any codes. If there are, write them down and then clear them and see if the problem goes away.
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Old 01-05-2013, 03:50 PM   #3
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I had the same issue after a couple dyno pulls. Put the car on a lift and check the rear ride height sensors. They are small metal rods (maybe 5 inches long) that connect to a moving arm. On mine, the force of the dyno pull had popped one of these rods out of the connecting sensor arm. Easy enough to fix.
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Old 01-05-2013, 05:35 PM   #4
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Service Suspension System

Same thing happened to me last week. Brought to dealer yesterday, there is a small rod with ball joints on each end that connects to the suspension sensor that was bent and disconnected. From the location, Im guessing that it was damaged when strapped for dyno. We were able to straighten and reconnect. Problem solved!
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Old 01-05-2013, 08:03 PM   #5
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Originally Posted by Drew P View Post
I had the same issue after a couple dyno pulls. Put the car on a lift and check the rear ride height sensors. They are small metal rods (maybe 5 inches long) that connect to a moving arm. On mine, the force of the dyno pull had popped one of these rods out of the connecting sensor arm. Easy enough to fix.
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Originally Posted by earld View Post
Same thing happened to me last week. Brought to dealer yesterday, there is a small rod with ball joints on each end that connects to the suspension sensor that was bent and disconnected. From the location, Im guessing that it was damaged when strapped for dyno. We were able to straighten and reconnect. Problem solved!
You guys were correct. Looked under the car and found the rods on both sides broken. I have attached pics for future reference of what they look like.

So for the rest of the audience, look out for these rods when strapping your car down on the dyno or towing! Thanks guys for your help!
Attached Images
  
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Old 01-05-2013, 10:13 PM   #6
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You guys were correct. Looked under the car and found the rods on both sides broken. I have attached pics for future reference of what they look like.

So for the rest of the audience, look out for these rods when strapping your car down on the dyno or towing! Thanks guys for your help!
This happened to me the dealer personally delivered the car to me
On his trailer and when he went to unhook the car after 3 hour drive
To me he noticed a broken rod ...and he told me something is broken
But he also said to me that he had never had this issue on regular camaros

Any way.....

He shipped out new modules with the rod ..cant just buy the rod piece
I imstwlled and the error went away.
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Old 01-05-2013, 10:20 PM   #7
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Originally Posted by LS1 Fun View Post
You guys were correct. Looked under the car and found the rods on both sides broken. I have attached pics for future reference of what they look like.

So for the rest of the audience, look out for these rods when strapping your car down on the dyno or towing! Thanks guys for your help!
This happened to me the dealer personally delivered the car to me
On his trailer and when he went to unhook the car after 3 hour drive
To me he noticed a broken rod ...and he told me something is broken
But he also said to me that he had never had this issue on regular camaros

Any way.....

He shipped out new modules with the rod ..cant just buy the rod piece
I imstwlled and the error went away.
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Old 01-05-2013, 10:43 PM   #8
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Quote:
Originally Posted by LS1 Fun View Post
Hi All, I dyno'd my ZL1 last night on a local dynojet and now my "service suspension system" notification won't turn off. Also, the car rides really rough as if the magnetic suspension has been shut off completely. Anyone else have this issue after a few dyno runs?

Dealers are closed today so Monday I will get it checked out. Anything I can try in the meantime or any recommendations?
What shop did you use and what were the results?
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Old 01-06-2013, 01:07 PM   #9
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What shop did you use and what were the results?
I went to Fresno Performance, they are only 10 mins away from me. Ended up at 485/474 bone stock (A6).
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Old 01-06-2013, 01:27 PM   #10
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Originally Posted by LS1 Fun View Post
I went to Fresno Performance, they are only 10 mins away from me. Ended up at 485/474 bone stock (A6).
Are they gonna pay for the new sensors they broke? You can count on about $200
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Old 01-06-2013, 02:00 PM   #11
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Are they gonna pay for the new sensors they broke? You can count on about $200
We'll see what the damage is tomorrow. I'm sure they'll stand behind their mistake.
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Old 01-06-2013, 02:27 PM   #12
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Wow! I going to have to remember this when I dyno mine.
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Old 01-06-2013, 02:34 PM   #13
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This post just goes to show you learn everyday! Had no idea about the existance or position of these rods. I'll be careful of these rods as they are hidden. Thanks for the info on this,great post!
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Old 01-06-2013, 02:47 PM   #14
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This post just goes to show you learn everyday! Had no idea about the existance or position of these rods. I'll be careful of these rods as they are hidden. Thanks for the info on this,great post!
With new cars, comes new sensors to learn about!! I'm sure all the big name shops figured it out right away after breaking a few.
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Old 01-07-2013, 12:13 PM   #15
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For anybody that needs it, here is the part name and #:

GM Electronic Suspension Position Sensor

Part #s 22772847 and 22772846
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Old 01-07-2013, 12:18 PM   #16
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Good thread!!

I knew about these sensors, but not that they were in danger of being broken with straps for a dyno run. Never paid much attention to that. Wow...sorry this happened to you guys, but thanks for sharing!
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Old 01-07-2013, 12:38 PM   #17
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i strapped my own car down on the dyno so i was very careful on placing these so they wouldnt be touched when it flexd under load. they are in a position that is pretty easy to snap them XD
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Old 01-07-2013, 12:39 PM   #18
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I will warn my shop when I do dyno runs in the spring. They did a couple runs just after breakin without issues.
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Old 01-07-2013, 01:11 PM   #19
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So can someone explain the do's and dont's of a proper strap down as to not mess up the rods and sensors.
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Old 01-07-2013, 02:54 PM   #20
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So can someone explain the do's and dont's of a proper strap down as to not mess up the rods and sensors.
Well, the main thing would be to place the straps so that no sensors will be in the way when the rear suspension flexes. The sensors/rods are attached to the suspension closer to the axle in the center. The straps should be set closer to the wheels to avoid damage to the sensors.
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Old 04-06-2013, 07:17 PM   #21
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Quote:
Originally Posted by LS1 Fun View Post
Hi All, I dyno'd my ZL1 last night on a local dynojet and now my "service suspension system" notification won't turn off. Also, the car rides really rough as if the magnetic suspension has been shut off completely. Anyone else have this issue after a few dyno runs?

Dealers are closed today so Monday I will get it checked out. Anything I can try in the meantime or any recommendations?

I HAD THE SAME PROBLEM. .TURNED OUT THAT A WIRE GOT BUMPED OFF A AENSOR. EASY FIX HAVE YOUR DYNO GUY CHECK THE SENSOR WIRES. I HAD MINE DONE ON DYNOJET At FINISHLINE RACING HERE IN DENVER. JOHNNY AND THE GANG ARE GOOD GUYS AND KNOW THEIR BUSINESS!
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Old 04-06-2013, 08:01 PM   #22
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It is at times like this i am glad to be a member on camaro5.I had no idea,but you can bet i will watch for this on a dyno or more so if i ever get towed.thanks for the info
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Old 09-17-2013, 11:34 PM   #23
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You gotta love C5. I just got my car back today from the Dyno and this was the message that popped up on my car. I will be taking it back Thursday so they can check the sensors to see if they are broken, misaligned, etc. This shop (GRC PERFORMANCE in Mission Viejo) works on everything from Mustangs to Ferrari's so I know they are trained in how to strap a car on a Dynojet, and this seems like a common issue for ZL1's so I'm neither upset nor worried about the fix.
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Old 09-18-2013, 11:17 AM   #24
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It is so easy to strap across these sensors because they are attached on the front of the rear control arms out of view. My dyno shop has strapped my car down 3 or 4 times and on the last dyno session they snapped both sensors. Be aware that the rear sensors are different for the 2012 vs 2013 model year. Another member here has a 2013, I checked the rear sensors and they have different part #'s.
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Old 09-18-2013, 05:55 PM   #25
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Mine is a 2013 so the part #'s I posted should fit a 2013 car
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