Rear Axle Replacement (15 Series)

Rear Axle Replacement (15 Series)

Removal Procedure

1. Raise the vehicle.
2. Place jack stands or utility stands, such as GMDE 123-B67313, at the front-end of the vehicle.
3. Support the rear axle with jack stands.
4. Remove the tire and wheel assemblies.
5. Disconnect the rear axle vent tube.
6. Disconnect the wheel speed sensor connector.
7. Remove the propshaft. Refer to Rear Propeller Shaft Replacement.
8. Disconnect the left-rear park brake cable from the rear axle.
9. Disconnect the right-rear park brake cable from the rear axle.
10. Remove the caliper assemblies from the rear axle.
11. Remove the stabilizer shaft from the rear axle.
12. Remove the crossover brake pipe from the rear axle.
13. Remove the coil springs. Refer to Coil Spring Replacement.
14. Disconnect the track bar from the rear axle.
15. Disconnect the lower control arm from the rear axle.
16. Disconnect the upper control arm from the rear axle.
17. Remove the rear axle assembly from the vehicle.

Installation Procedure

1. Install the rear axle assembly to the vehicle.
2. Connect the upper control arm to the rear axle.
3. Connect the lower control arm to the rear axle.
4. Connect the track bar to the rear axle.
5. Install the coil springs. Refer to Coil Spring Replacement.

Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

6. Install the crossover brake pipe to the rear axle.

Tighten
Tighten the bolt to 22 Nm (16 lb ft).

7. Install the stabilizer shaft to the rear axle.
8. Install the caliper assemblies to the rear axle.
9. Connect the right-rear park brake cable to the rear axle.
10. Connect the left-rear park brake cable to the rear axle.
11. Install the propshaft. Refer to Rear Propeller Shaft Replacement.
12. Connect the wheel speed sensor connector.
13. Connect the rear axle vent tube.
14. Install the tire and wheel assemblies.
15. Fill the axle with lubricant. Use the proper fluid.
16. Remove the utility stands and the jack stands.
17. Lower the vehicle.