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 Upper Hinge and Lower Hinge Replacement
Preliminary Procedure
Remove the front wheelhouse liner. Refer to Front Wheelhouse Liner
Replacement.
Remove the front fender insulator. Refer to Front Fender Insulator
Replacement.
Remove the front side door. Refer to Front Side Door Replacement.
Front Side Door Hinge Bolt ( ...
Steering Column Replacement (Right Hand Drive)
Caution: With wheels of the vehicle facing straight ahead, secure
the steering wheel utilizing steering column anti-rotation pin, steering
column lock, or a strap to prevent rotation. Locking of the steering column will
prevent damage and a possible malfunction of the SIR
system. The steering ...
Replacing Safety Belt System Parts after a Crash
WARNING
A crash can damage the safety belt system in the vehicle.
A damaged safety belt system may not properly protect the person using it, resulting
in serious injury or even death in a crash. To help make sure the safety belt systems
are working properly after a crash, have them inspected a ...