2009 Gmc Sierra 20" Wheels

ironhead3fan · September 5, 2009

OK, here is goes. I haven't been home for a week, so I decide to take out the new truck (1 month old, 503 miles) and go to dinner about 25 miles away. Being I am above 500 miles now, I go ahead and take it out on the highway. Anything over 65 mph, the front end shimmies. The salesman told me this would happen with those 20" wheels if they sit for a while. Well, after a 50 mile round trip, still have the square wheel shimmie feeling. Is this something I should expect every time I take my truck out, or do I just have tires out of balance already? The old clunker I traded in for this never ever had this happen.

Spurshot · September 5, 2009

See the other threads on OEM tires. There's one about the bottom of the page about 07 Denali being way better after putting on some Bridgstones .

ironhead3fan · September 5, 2009

The one about sidewall failure?

Wires · September 5, 2009

OK, here is goes. I haven't been home for a week, so I decide to take out the new truck (1 month old, 503 miles) and go to dinner about 25 miles away. Being I am above 500 miles now, I go ahead and take it out on the highway. Anything over 65 mph, the front end shimmies. The salesman told me this would happen with those 20" wheels if they sit for a while. Well, after a 50 mile round trip, still have the square wheel shimmie feeling. Is this something I should expect every time I take my truck out, or do I just have tires out of balance already? The old clunker I traded in for this never ever had this happen.

What tires do you have on those rims? Our '08 SD has Goodyear Eagle LS-2's on 20" rims and after 10k miles, it still runs smooth as glass. You can take it up to 100MPH with no shimmy, nothing. They don't have a square feeling either after sitting (I know what you mean though, I had a set of Continentals on our Acura, and the first couple of miles in the morning was thump thump thump).

It sounds like a tire is out of balance. You can check reviews at tirerack. See if anyone else posted a review on your tires that they have a flat spot after sitting. But, I've never had that issues with ANY tires supplied OEM. Only found that from tires I've swapped on.

ironhead3fan · September 5, 2009

They are the ones that came on the truck, the Goodyear Eagles LS2. I will make a trip back to the dealer to get them to re-balance them. Thanks.

Wires · September 6, 2009

They are the ones that came on the truck, the Goodyear Eagles LS2. I will make a trip back to the dealer to get them to re-balance them. Thanks.

I'd have that checked out. Ours is even fine when it's -34 out.

crepitus · September 6, 2009

They are the ones that came on the truck, the Goodyear Eagles LS2. I will make a trip back to the dealer to get them to re-balance them. Thanks.

Had that happen with my factory 20s when I bought my truck. They were also the GY LS2s. Have the dealer road force balance them. They found 1 to be out of round. Replaced it and never had the problem again.

ironhead3fan · September 6, 2009

Thanks, I will do just that.

ironhead3fan · September 9, 2009

Went to the dealer today. They did a road force balance on all the tires. It seems the left front would not balance. That tire is now on the right rear. They are ordering me another one. Should be here in a couple of days. Only rode a few miles afterwards, but it does feel better now.

Thanks for the heads up guys.