I have an 08 GMC 1500 4x4 the best i can tell the rear is 3 inches higher than the front.went to my local procomp dealer today and he tried to talk me into a 1.5 spacer.He claimed it would raise it 2 to 2.5 inches.That just doesnt make sense to me. They also have a 2.5 inch kit which is the one I would think that i would need.I want it level not the front taller than the rear.Thanks