I have an 03 Denali AWD and I have done the rear shocks and compressor already. I thought the rear shocks were expensive but I can only find $400+ for the front, WOW. Is there a refurbished product out there that will work with the auto ride-leveling system on a Denali? The truck has 165k miles on it and it moves a lot in the wind and the front end is mushy when you move the steering wheel back and forth.