well after moving approxamitly 200 lbs of furniture in a double axled 6' by 12' trailer, My Envoy sagged and didnt handle very good...I am thinking after I have my lift and tahoe rear springs (Not Z71's) and rear Air ride rights, Also the Pcm for less tune, I will never sag again and will have better pickup. lol For some reason I cannot stand when a Truck saggs, drives me nuts! Anybody got different rear springs? Hows the ride? Towing?