For service and parts needs, visit your dealer. You will receive genuine GM parts and GM-trained and supported service people.
Genuine GM parts have one of these marks:

Vehicle Care
California Proposition 65 WarningService Publications Ordering Information
Service Manuals
Service Manuals have the diagnosis and repair information on the engines, transmission,
axle, suspension, brakes, electrical, steering, body, etc.
Service Bulletins
Service Bulletins give additional technical service information needed to knowledgeably
service General Motors c ...
Rear Axle Replacement
Special Tools
EN 45059 Torque Angle Sensor Kit
For equivalent regional tools, refer to Special Tools.
Removal Procedure
Raise and suitably support the vehicle. Refer to Lifting and
Jacking the Vehicle.
Remove the tire and wheel assembly. Refer to Tire and Wheel Removal and
...
Rear Bumper Fascia Replacement
Preliminary Procedure
Remove the tail lamps. Refer to Tail Lamp Replacement.
Rear Bumper Fascia Retainer (Qty: 2)
Rear Wheelhouse Liner Bolt (Qty: 6)
Caution: Refer to Fastener Caution in the Preface section.
Tighten
2.5 N·m (23 lb in)
Rear Bumper Fascia
Procedure
Pull th ...