OK so I have a 97 Chevy Silverado Z71 4x4. It has about 75k miles on it and it sits on 33" tires. It has a 3 inch body lift and that's it. I drove the truck with the 33's for several years without any problems what so ever but it has developed a front end shake that no one seems to be able to fix. The first guy told me it was the idler arm. I replaced it. The second guy said it was that the tires were cupped. So I bought all new tires and even rims too. STILL SHAKES! So now I'm pissed and poor and don't know what to do next. The cupping of the tires was definately caused by the shimmy. Basically The shimmy starts at around 42mph and you have more or less driven out of it at around 50 and then you go through it again on the slow down. ANY IDEAS?? I'm tapped out.