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 WarningFront End Upper Tie Bar Replacement
Preliminary Procedure
Remove the front bumper fascia. Refer to Front Bumper Fascia
Replacement
Remove the radiator support bracket. Refer to Radiator Support Bracket
Replacement
Remove the radiator grille reinforcement support. Refer to Radiator
Grille Reinforcement Suppor ...
Rear Spring Replacement
Removal Procedure
Raise and suitably support the vehicle. Refer to Lifting and Jacking the
Vehicle.
Support the rear axle with a tall jack stand near the shock absorber.
Remove the lower shock bolt. Refer to Shock Absorber Replacement.
Using the tall jack stands, slowly lower the rear a ...
Instrument Panel Upper Compartment Replacement
Instrument Panel Upper Compartment Screw (Qty: 2)
Caution: Refer to Fastener Caution in the Preface section.
Procedure
Before removing the instrument panel upper compartment screws, remove mat.
Tighten
2.5 N·m (23 lb in)
Instrument Panel Upper Compartment Assembly
...