Buy 2012 Gmc Sierra 2500 HD 6.0L Vortec V8 FLEX A/T RWD WT Standard Cab Pickup Fleetside Suspension Causing, Arms - OEM Gmc Part # 11601921

Suspension Control Arm Washer. Upper Control Arm retainer.
Washer for Control Arm.

Suspension Control Arm WasherSuspension Control Arm Nut

Fits Corvette

Suspension Control Arm - Repair or Replace
Control arms often don’t fail on their own, although their associated bushings can break or wear causing a clunk noise when your 2012 GMC Sierra 2500 HD goes over bumps or changes speed rapidly—whether braking or under hard acceleration. Control arms can also sometimes become bent, causing your vehicle to pull to the left or right.