Vibration from 58 to 68 mph.

[Wayner2k2]

Originally Posted by Texhawk

As pointed out in the service bulletin, the tires can be balanced, but the tire/wheel assembly may have a high or low spot that only shows up under load testing of the assembly. The wheel may have a slight high point and the tire may have a high point, that if they are not offset by the way the tire is mounted, could cause a vibration.

Could just be a bad set of tires.

Thank God for the service bulletin! It’s called a tire hop. Took it to two dealerships, explained what and how to fix it. Their response was a blank stare. @(*$%^& Idiots! The bad part is the second dealer trip was AFTER the service bulletin was released. I'll stop my comments there. However, I'm going to call the local Caddy dealership to have it looked at this time. Fingers crossed I'll come back with a smooth drive.

[tradosaurus]

I had this vibration issue on a set of new tires for a different car a few years back. After Discount Tire performed a special balancing (match mounting?) of the tire they finally decided to replace the tires.

After that the car road fine.

But good luck getting your tires replaced on a new car.



"WHEEL & TIRE RUNOUT VIBRATIONS

Sometime wheels will still shake and vibrate even after they have been balanced. The problem is often excessive wheel runout or tire runout. Most tires should have less than .030 to .050 inch of runout. An out-of-round tire can produce harmonic vibrations that come and go at various speeds depending on how many "humps" are in the tire.

As a rule, most steel rims should have less than .050 inch of runout, or .040 inch of runout if the rims are aluminum alloy. Some trucks and SUVs can tolerate up to .060 inch of radial and lateral runout, but others can't handle any more than .030 inch of runout before vibrations become noticeable.

Runout problems can often be corrected by "match mounting" the tire on the wheel (rotating the tire so the tire high spot is over the rim low spot). "

http://www.aa1car.com/library/wheel_balancing.htm

[deibelsan]

No problems at all. In fact, mine is so smooth that I accelerate through 70mph and on to over 80mph sometimes without even realizing it. Definitely cool but a little scary how quick and easy the car gets up there without making a whimper.

[SamReidland]

GM should go to the unlimited warranty because everything that is wrong with the car they just say "that is normal". I think the engine could fall out of mine and they would say that's normal.

[domano 68]

My 2010 1SS 6spd does this and has done this for a while. Only at 70mph and higher. I only feel vibrations in the seat however. I plan on taking it to the dealership soon and hope its just a tire balancing issue.

I know this thread is somewhat old but is there any new information here? TIA!

[pumpkinrancho]

I see that they mention you should drive the vehicle 10 miles to releive any flat spotting. My office is only 7 miles from my house. It always vibrates until the tires are warmed up. A lot of people who live in a warmer climate probably have never experienced this. I can not wait to buy new tires, however they still have tons of tread....

[camaro52010]

Smooth as silk from zero to 124 mph.
No issues

[PaceSS]

I also have this problem at around 78 and above. Really bad at 83, took it to dealer and they balanced all 4 tire because they said were out of balance, and road forced the tires. They said it was fixed. drove off and the same problem still exists, call the dealer and said we can do anything about it if above 70 (the legal speed limit). I told them that was BS, that this car is biuld for high speeds. The manager never called me back!!!!!!!!!! It's really bad when tires are cold.

[GhostOutlaw]

U know what, I have been starting to notice this issue lately too. I guess I'll mention it when I bring it in for the spoiler issue

[Entaille]

from the sounds of they are just going to waste my time and tell me it's normal. cannot wait to replace these tires, but it will be a while before I do .. : p

[2011ss/rs]

My 2011 SS is not doing this but my 2009 Pontiac G8 GT is, We brought it back to the dealer for new tires that did not work, brought it right back for four wheel balance job still did not fix it. The service manager said to me well you know the car has 28,000 miles on it I laughed at him I have a 210,000 mile Blazer and 200,000 mile Toyota and they do not have this problem. I have posted the complaint on a G8 site and I got a welcome to the club. Lets hope GM recalls our cars for this problem because it it BS $35,000 plus should not do this.

[rtcat600man]

I have noticed this issue too. Mine is between 65 and 75 mph. The slightest amount of vibration can be felt thru the steering wheel. Bottom line, not going to worry about it.

[camaro52010]

sure sounds like wheel balance or tire pressure

[mj2112]

Yes, mine does this as well. Brought it to the dealership, they balanced the tires and it still does it.