GM 15835457
Coil Spring, Rear

First, raise and support the vehicle where you're shifting the rear spring, insulator, and jounce bumper. Replace the rear wheel and tire then put an adjustable jack stand under the lower Control Arm. Subsequently, undo the lower stabilizer shaft link bushing combined with nut, then lower shock absorber bolt, and lower bolts from the knuckle. Gently lower the vehicle with the adjustable jack stand until the rear spring, insulator, jounce bumper sprig seat can be taken off. For installation , position spring seat , jounce bumper , rear spring , and insulator on the lower Control Arm. Lift the lower Control Arm using the adjustable jack stand up until the lower bolts for the knuckle can be positioned onto the Control Arm then remove the jack stand. After, attach the lower stabilizer shaft link bushing and nut and finally the lower shock absorber bolt. Finally, put the rear tire and wheels on the vehicle and take off the support and lower the vehicle.

A vehicle support system and proper vehicle positioning are necessary before beginning the rear spring, insulator, and jounce bumper replacement. The first step begins by removing the wheel and tire from the rear position followed by placing an adjustable jack stand under the lower Control Arm. Begin by taking out the lower stabilizer shaft link bushing and nut then follow with removal of the lower shock absorber bolt and lower bolts from the knuckle. The adjustable jack stand will lower the vehicle to remove the rear spring , insulator and jounce bumper and spring seat . Position the spring seat together with the jounce bumper , rear spring and insulator onto the lower Control Arm during installation. Start by lifting the lower Control Arm with the adjustable jack stand before installing the lower bolts for the knuckle. Remove the stand afterward. First install the lower stabilizer shaft link bushing with its matched nut then add the lower shock absorber bolt. To complete the process install the rear tire and wheels then remove the support before lowering the vehicle.

Repositioning the rear spring and insulator with the jounce bumper starts by raising and supporting the vehicle followed by tire and wheel removal. Position an adjustable jack stand beneath the lower Control Arm to remove the lower stabilizer shaft link bushing and nut followed by the lower shock absorber bolt and lower bolts from the knuckle. Lower the vehicle with the adjustable jack stand at a controlled speed until all parts including the rear spring , insulator , jounce bumper , and spring seat can be accessed. Start installation by setting up the spring seat , jounce bumper , rear spring , and insulator on the Control Arm. Next raise the Control Arm with the adjustable jack stand until you can install the knuckle's lower bolts. Begin by removing the adjustable jack stand before attaching the lower stabilizer shaft link bushing, its nut, then installing the lower shock absorber bolt. Place the rear tire and wheels before taking out vehicle support and lowering the vehicle.

Remove the strut from the Strut Spring Compressor (J 45400) and install it back into the vehicle.

Position the spring seat, jounce bumper, rear spring, and insulator on the lower control arm, then raise the lower control arm with the adjustable jack stand until the lower bolts for the knuckle can be installed.

Loosely install the strut retaining nut, ensuring to hold the strut shaft with a socket while using the J 42991 to install the upper strut mount nut, tightening it to 85 Nm (63 lb ft).