I have been frantically trying to solve this issue with the shop that did the install. I went with a cognito 3in leveling kit. kit includes new UCA's, fox 2.0 shocks, rear 1 in boick and steering and pitman/idler arm support. I had this installed and then went ithj the first set of tires, Nitto's ridge grapplers 295/65/20 on stock wheels and this is where the dilemma begins. I get the truck aligned and I noticed a lot of sway from back end. It swayed before the alignment so I thought it was just the fact the it needed the alignment. Truck felt as if the rear end was loose. I checked every nut and bolt that was removed/replaced and all torqued down. Went for a ride and at hiway speeds (70-85) when doing a lane change truck did not feel stable at all. We even went as far as changing out the spring U-Bolts to brand new ones and torqued those down to spec per GMC instructions and still have some sway. At this point I switched tires to Falken at3's with a lower sidewall, 295/60/20. same things. took off the blocks and still same thing. Today we took off the Fox shocks and it still sways. tried different settings for air pressure, 60/60, 60/70, 70/80 and same issue. The tries are 10 ply and truck is not currently being used for towing due to this issue.
anyone ever experience this? any insights on what else to try next?
Truck has been in the shop longer than on the road since doing the leveling.
truck is a 2021 At4hd diesel 2500. any help or recommendations is greatly appreciated.
I'm not expecting it to be as solid as my rx7 on the turns, but at least stable on a lane change and not as surprising as a carnival ride!!
anyone ever experience this? any insights on what else to try next?
Truck has been in the shop longer than on the road since doing the leveling.
truck is a 2021 At4hd diesel 2500. any help or recommendations is greatly appreciated.
I'm not expecting it to be as solid as my rx7 on the turns, but at least stable on a lane change and not as surprising as a carnival ride!!
