GM 91172941 Rear Suspension Control Arm

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To begin, block the front wheels and securely support the rear of the vehicle. Remove the rear wheel(s) and reference mark the position of the cam for rear toe adjustment. Loosen the nuts mounting the trailing arm to the body and the knuckle-to-trailing arm mounting nut. Place a jack under the trailing arm to prevent it from lowering. Remove the lower mount nut of the knuckle and raise the jack enough to remove the knuckle-to-trailing arm mounting bolt. Separate the knuckle from the trailing arm and gradually lower the jack to remove the coil spring. Remove the body-to-trailing arm bolts and finally, remove the trailing arm. For installation, reverse the removal steps and ensure the rear toe adjustment cam is placed in the same position as before.

Replace it with a new one.