I have an 06 1500 QC 4x4. 06 was the first year to get the coils. I used Bilstein adjustable shocks set on the highest setting. Worked great. If you go that way, do your self a favor and buy new lower bolts. You'll most likely have to cut the factory ones to get them out. I later added a 3" Zone body lift with gap guards. Very happy with the results.