2001 Silverado 5.3l 4x4, 6 inch lift. My old Ranchos were completely gone simply noticeable after bouncing around coming out of small dips. Replaced all four shocks with these 5100 and it is like night and day. It handles very well, a little too stiff than I would like but hopefully it will break in after a few hundred more miles. I would definitely buy these again for my other vehicles.