GM CAN'T FIX MY C6

[baddawg]

Hi all
I have a 2007 C6 coupe which has been back to the dealer 6 times for a vibration in the steering wheel. Vibration begins at 58 mph and gets worse the faster I drive.
Here is a little history...
1st service-they rebalanced all wheels with traditionall balace machine- vibration unchanged.
2nd service-they rebalanced all the wheels using roadforce - vibration unchanged.
3nd service-they replaced front right rim due to excessive roadforce - vibration unchanged.
4rd service-they replaced front right tire due to escessive roadforce - vibration unchanged.
5th service-they replaced right rear tire due to excessive roadforce - vibration got worse!
6th service - now in the shop. They did a frequency vibration analysis with GM. Result: They have ordered a new front left tire.

The dealer does not dispute the vibration, but can't fix it. I called GM customer assistance this week and now have a claim number with them. Not sure how that will help, but this issue has now gotten beyond OLD. I really don't see any end to this process.

If anyone has some advice, I'd love to hear it.

Thanks...
baddawg

 

[BruceBed]

Hi all
I have a 2007 C6 coupe which has been back to the dealer 6 times for a vibration in the steering wheel. Vibration begins at 58 mph and gets worse the faster I drive.
Here is a little history...
1st service-they rebalanced all wheels with traditionall balace machine- vibration unchanged.
2nd service-they rebalanced all the wheels using roadforce - vibration unchanged.
3nd service-they replaced front right rim due to excessive roadforce - vibration unchanged.
4rd service-they replaced front right tire due to escessive roadforce - vibration unchanged.
5th service-they replaced right rear tire due to excessive roadforce - vibration got worse!
6th service - now in the shop. They did a frequency vibration analysis with GM. Result: They have ordered a new front left tire.

The dealer does not dispute the vibration, but can't fix it. I called GM customer assistance this week and now have a claim number with them. Not sure how that will help, but this issue has now gotten beyond OLD. I really don't see any end to this process.

If anyone has some advice, I'd love to hear it.

Thanks...
baddawg

1 800-LEMON LAW, OF COURSE IT'S AN ATTORNEY....

 

[c4c5specialist]

HI there,
The dealership cannot fix it, not GM. Any Corvette can be repaired using correct service information and the tools given to us.
Sounds to me like nobody is using strategy based diagnostics.
What are the frequency readings? These would be needed for accurate internet assistance.
Rim runout should be measured ON THE CAR>
Wheel hub bearing RUN OUT should be measured ON THE CAR>
Diagnostics is very very specific on vibration correction.
Allthebest, c4c5

 

[Patrick]

Baddawg,
I agree with C4C5Specialist.

If you're experiencing this many trips to the dealership over the same problem, the issue here may be that the dealership you're going to simply doesn't have the experience in dealing with Corvettes.

It may be time to find another Dealership for service issues. And rather than chosing one at random in your area, you may want to correspond with some Corvette Clubs in your area and get some recommendations on Dealerships they prefer for service needs.

-Patrick

 

[baddawg]

Thanks Patrick
I'm using Koons Chevy in Northern Virginia and they are supposed to be the corvette experts for the area. They have been very responsive and trying hard to identify the issue. They have been comunicating with GM corvette reps to help solve the vibration, but no success thus far. At what point is it considered too many visits and I try to get GM to buy back the car? If it came down to that, I would just go buy another one - but only after a long test drive ;-)

Thanks for the help!
BD

 

[Patrick]

...At what point is it considered too many visits and I try to get GM to buy back the car? If it came down to that, I would just go buy another one - but only after a long test drive ;-)

Thanks for the help!
BD

I hate it when people answer a question with another question, but in this case, I'm going to have to violate my own rule. Part of the answer depends upon how you would answer the question "at what point do you consider it too many visits regarding the same issue?" The other part would depend on what your state's Lemon Laws have to say on the subject.

Let us know how your attempts to get the issue resolved turn out.

-Patrick

 

[c4c5specialist]

HI there,
I will do this in 4 posts, so that the specifics will be covered.
First thing is first, the TIRE measurements on the car. Using either 1 or 2 dial indicators, you can determine if there is a problem with the tire/rim assembly ON THE CAR!!
This first picture is to measure the actual TIRE lateral variation which is NOT measured with a roadforce balancer.
Your simply rotating the wheel one full revolution and looking for less then .060 runout.

 

[c4c5specialist]

Next, you measure actual verticle or up and down runout of the tire and wheel.
Your first move is to wrap the measuring contact area with one layer of smooth masking tape.
Then you rotate the wheel one full revolution to measure the runout, which should be less then .060 in.

 

[c4c5specialist]

If after you measure both, you find that your rim/tire is out of specification, then you need to measure the runout of the hub which you bolt the tire to.
This next diagram is for the wheel stud runout. .010 is the specification.

 

[c4c5specialist]

The final measurement of the hub assembly is the flange FACE.
Now, if you measure this, and it is out of specification, then you might be dealing with a mismachined part or surface.
The specification is .005 and you can reference the pic below for the last measurement.
Allthebest, c4c5

 

[baddawg]

Vibration Resolved - I think

Hey guys
Well, I got my vette back after they replaced the front left tire and the vibration was much less. They got the roadforce on the tire down to 9, from 14. I still had some wheel nibble above 75, so I went back to the dealer. They advised that is was normal and suggested I drive an '08 model which I did today.

To my surprise the new '08 had the same vibration. I really notice it at 85+. The people I have talked to think this is caused by the EMT tires, and the nature of the corvette design. In a corvette, one will "feel" the road more than a normal car. I'm surprised I don't see more posts/complaints in forums for this corvette "feature."

In any case, Thanks to everyone for the help. I ready to put this issue to bed. I still love my C6!
BD

 

[Evolution1980]

I still had some wheel nibble above 75, so I went back to the dealer. They advised that is was normal and suggested I drive an '08 model which I did today.

To my surprise the new '08 had the same vibration.

Feeling the road is one thing. Vibrations at certain speeds is another. Sounds very strange that you felt the same thing in a brand new car as well.
Ah well...as long as you are satisfied.

 

[Norseman]

Suprised

You shouldn't really be surprised that not many others have complained about this as the speed limit in most states is 65 mph. Most of the peeps in this forum are old fogies; and probably drive at the posted limit. I know I'm going to get a lot of crap for that last remark:W and I was kind of kidding; but really most people don't drive above 75 mph on a regular basis. In fact I bet most don't drive above 55mph. I'm an exception but I have the Z51 option and love the feed back I get.

 

[Evolution1980]

Most of the peeps in this forum are old fogies; and probably drive at the posted limit. I know I'm going to get a lot of crap for that last remark:W and I was kind of kidding

I bet that if you got an honest breakdown of the age groups represented here versus other vette sites, you'd be surprised to find it very close to even. Mostly because it's all the same people w/ different screen names. We all just pick and choose at which site we spend most of our time.
If I'm looking for tech advice or reference, I come here. If I'm just looking to BS and talk smack about this or that, I'd take it to the other sites. :cool

----------
"Taking naps has been proven to delay the onset of old age. Especially if taken while driving."

 

[Norseman]

Sites

IMHO this is the best site. Except for my Subi STi stie it's the only one I visit on a regular basis. By the way I got my ass kicked by a Viper last Saturday; well not exactly kicked. I had him for about 500 feet. At the next light the girl next to him was smiling at me and said she thought I had a hot car. The driver didn't say anything.:L

 

[c5y2k]

I drove home yesterday with the flow of traffic @ 80mph.

 

[LT4man]

Any vibrations?

SAVE THE

 

[c5y2k]

Nope very smooth.

 

[smook]

Never had any vibrations on either my c6z or my c5z. At any speeds.

Rock solid.

Maybe, a bad rim ? You shouldn't have any vibration.
-zBill.

 

[Norseman]

Maybe

Maybe it was built just before the strike.