Ok, so I have an 05 Bonneville GXP, and I was doing an oil change last night, and when I had the car up on the lift I noticed that BOTH rear tires are totally worn out on the inside of the tire only. The tires are about two years old and were put on by me, and have not been rotated from the front at all. My question is, Is there something in the rear end that needs an alignment??? Just wondering because Im gonna have to change these out and put new ones on it again, and dont want to repeat this process over again.

Thanks.

yes, I would get the rear checked for toe adjustment and rotate the tires for even wear

_________________
poverty forces one to do unorthodox things

2000 SSEi
past rides:
1996 SSEi
1992 GTP
1987 Grand Am

I was going to say, sounds like a negative camber adjustment issue.

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Retired Bonneville Owner and former GM Tech:
2004 Pontiac Bonneville GXP: Black/Ebony *SOLD*

Summer Toys: Combined 827 RWHP / 877lb/ft RWTQ
2004 Pontiac GTO: Impulse Blue Metallic/Black/M6: lots 'o mods, 415 RWHP / 405lb/ft RWTQ!
2006 Cadillac STS-V: Light Platinum Metallic/Light Gray/A6 - Spectre CAI, Magnaflow exhaust, Speed Inc. tune, 412 RWHP / 472lb/ft RWTQ

Daily Drivers:
2019 Chrysler Pacifica Limited: Mommy's new RGC
2015 Chrysler Town & Country Limited Platinum: Kids new RGC
2007 Chrysler Town & Country Limited: Sold to neighbor
2009 Pontiac G8 GT: L76, Sport Red Metallic
2003 Chevrolet Suburban 2500: Doeskin Tan - 8.1L Big Block... new plow truck
1999 Chevrolet Suburban: Sunset Gold Metallic - Daddy's winter beater and plow truck

So.... The saga continues. I put new tires on the car again, head a 4 wheel alignment and the tech said that the level ride system in the rear end i is not working. Although it does it's 2 second power up when the car is started, and the manual switch in the trunk works and raises the car. What could be the fix for this? And to go along with that, what is a measurable height of the back of the car? Say from the floor to the top of the wheel whell? Because I've played with it a bit the past week or so to try to help save the tires until I can get it fixed correctly. And we have had ice and snow lately, and when the suspension is too high the ass is Really loose on icy roads. I mean REALLY loose. Hopefully someone has had this issue before and figured it out and can point me in the right direction. Thanks.

hi,did you use proper sized tires?
there should be a ride height sensor under rear - check that and try lowering tire pressure.
trim height is 7-8 inches from ground to car bottom at rear door ....for my 2000 iirc

_________________
poverty forces one to do unorthodox things

2000 SSEi
past rides:
1996 SSEi
1992 GTP
1987 Grand Am

If the pump is working and raising the car, maybe you have a ride height sensor issue?

_________________
-Car Guy Carl
"Penelope" - 2003 SLE - 247k Miles
"Sydney" - 2000 Honda S2000 - 98k miles