Lowered 01 Denali suspension problems

[Smarthome2]

New to the site! Old to Yukons! I have an 01 that I've owned since new. Started having this particular issue when it was all bone stock. Driving on I95 headed to Va, thought I hit something with the rear tire, heard it hit the wheel well. Then the truck acted as if I had a flat, all over the road. I pulled over & checked all 4.. No flat, normal pressure, but the truck was all over the road. Took it to the dealer (1st mistake) their answer was to replace rear shocks & auto ride pump. Ok, done. Still drove bad, replace front shocks, no difference. So ffwd to now. Lowered 3" (summit racing kit) New sway bars front & rear with all the bushings etc. Upper & lower trailing arms in the rear. Idler & pitman arm, upper control arms, fresh alignment, and it still drives like a bobber in the sea moving side to side, enough to make you seasick. I have yet to find a suspension specialist in Atlanta where i reside now & all the mechanics I've questioned have no idea. I refuse to let this beast go since It just got a new Texas Speed 408 stroker, stage 5 Trans, Monster transfer case, driveshaft, front differential etc etc etc... only thing left is the Torsion Bars & the factory rack n pinion. Anyone have a suggestion?? All help welcome!!!

 

[singhnyc]

I had the same problem with my truck would wonder around all over. I changed all the control arms Fornt and back, new rack. wasted close to 4k on parts and labor with not luck. I want to one of friends place and he said to change all 4 of tires might have a bad belt from impact so replaced all 4 tires and truck rides fine no wonder on highway. its a 2017 suburban

 

[Smarthome2]

I had the same problem with my truck would wonder around all over. I changed all the control arms Fornt and back, new rack. wasted close to 4k on parts and labor with not luck. I want to one of friends place and he said to change all 4 of tires might have a bad belt from impact so replaced all 4 tires and truck rides fine no wonder on highway. its a 2017 suburban

Been thru 3 or 4 sets over time & current are new as well.

 

[1992rs]

If I read that correctly, about the only thing you haven’t changed yet is the lower control arms and tie rods. Tie rods wouldn’t make it ride like a boat, but the bushings in the lower control arms could. Have you checked them out yet? Also what is summit racing’s drop kit consist of? If you lower via keys and crank it down too much I hear it can ride terrible.


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