my husband bought this Avalanche,in2004 it only had 22000 miles on it. He only drives to and from work which is only about 10mi one way and few odd trips .It still has under28000 mi but the front end on the left you can feel bumps up to the steering wheel and your not driving over a bump. My son was a machanic in the Army and he has looked at it but doesn't see anything. He also says the truck has adjustble springs or somthing and they seem ok. He thinks it might be the tires and come to think of it, the last time I had the tires rotated is when seems like it started doing that. unless my husband ran into a curb or something I don't know about. Any opinions.