I've got a 2000 GMC sierra long box regular cab, it has 60,000 kM on it and it shakes and shimmies pretty noticibly and I don't think it has anything to do with the tires or wheel alignment. I am also now getting the "service 4WD" light coming on occasionally. I was wondering if anybody else has experienced this? I never abused it and hardly used the 4WD but the warranty is now up and I don't want to take it in before I talk to other people about it. I maybe put 2000kM/year on it.
Anybody help??