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 Side Door Weatherstrip Replacement - Body Side
Front Side Door Weatherstrip - Body Side
Procedure
Start at the rear upper corner of the door opening and pull the
weatherstrip away from the door opening flange.
Position the weatherstrip in the upper corner of the center pillar.
Working downward along the front edge, in ...
Power Steering Gear Inlet Pipe/Hose Replacement
Removal Procedure
Remove front bumper fascia. Refer to Front Bumper Fascia Replacement
Remove as much power steering fluid from the remote power steering fluid
reservoir as possible.
Place drain pans under the vehicle as needed.
Remove power steering gear inlet hose bolt (1).
...
Instrument Panel Assembly Replacement
Preliminary Procedures
Disable the SIR system. Refer to SIR Disabling and Enabling
Remove the front floor console assembly. Refer to Front Floor Console
Replacement.
Remove the radio assembly. Refer to Radio Replacement.
Remove the driver information display bezel. Refer ...