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:

California Proposition 65 WarningBrake System External Leak Inspection
Warning: Refer to Brake Fluid Irritant Warning.
Caution: Refer to Brake Fluid Effects on Paint and Electrical Components
Caution.
In order to inspect for external brake fluid leaks, first inspect the fluid
level in the master cylinder.
While a slight brake fluid level drop c ...
Fuel Tank Filler Pipe Replacement (Steel Tank)
Removal Procedure
Remove the fuel filler door housing. Refer to Fuel Tank Filler Door
Latch Housing Replacement.
Remove the bracket fastener (1).
Lift and support the vehicle. Refer to Lifting and Jacking the Vehicle.
Remove the fuel tank filler p ...
Power Steering Pump Belt Installation
Special Tools
EN-50098 Belt Installer
For equivalent regional tools, refer to Special Tools.
Install EN-50098 installer (2) and a NEW power steering pump belt (1)
to water pump pulley and power steering pump pulley.
Turn the engine slowly clockwise at the crankshaft ...