2005 Chevrolet Silverado 1500 4dr Extended Cab LS 4WD LB (5.3L 8cyl 4A)
Very bouncy rear end, not a pleasant ride even on smooth roads. GM says it is charteristic of this model, nothing they can do. Even with a load in the bed (1000+ lbs.) it still rides stiff. Had a 2004 model that was great, service mgr said they changed the design (both 4x4). I made the mistake of not driving the truck before purchase - assumed it would be the same as my 04. I would not have purchased this truck had I known. Looking for help from GM for 3 months but, to no avail. I switched to Michelin tires, some help but, still wears me out to drive long distances.
Fix shocks and/or springs in rear to provide a smooth ride.