TRW JTC1999 Front Upper Control Arm for Chevrolet Silverado 2500 HD: 2011 - 2017, Chevrolet Silverado 3500 HD: 2011 - 2017, GMC Sierra 2500 HD: 2011 - 2017, GMC Sierra 3500 HD: 2011 - 2017 A control arm is the hinged suspension link that connects the chassis and the suspension that carries the wheel. Attached with a single pivot, normally a rubber bushing, the control arm can adjust the position of the outboard end while sustaining the radial distance from the inboard mount. A control arm…