I just bought an 08 LTZ and I noticed that the left rear was sitting lower than the right. I measured from the axle to the top of the wheel-well and sure enough it was off by about an inch. I had an appointment to get the headlamp assembly replaced as it was cracked before I bought it so I asked them to take a look. I naturally thought it was the autoride causing problems and of course they are saying that it's working fine. Looking under the truck and at the coil springs it all seems to be straight and no damage showing.

I'm supposed to pick it up today at noon and just would like to have some ammo for my discussion on what the problem might be. Any thoughts? Any body else have this problem? I've search around the forums and can't find anything on it.

Thanks in advance.

 

Update: No responses yet, and no truck (another story). They put it on the alignment machine and stated that is was within acceptable limits, apparently 3/8".

 

Check it on multiple "flat surfaces" don't rely on just your driveway, check it in the Wallyworld parking lot, a parking garage....
I would suspect a weak shock or spring...I don't know if the Autoride shocks can be swapped side to side but that is a free and easy enough place to start...