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 WarningWindshield Garnish Molding Replacement
Preliminary Procedure
Disable the SIR system. Refer to SIR Disabling and Enabling.
Windshield Garnish Molding Assembly
Procedure
Loosen tether clip and steel clips.
Disconnect electrical connector.
The tether clip at the upper portion of the garnish molding MUST be
repla ...
Transmission
Driver Shift Control (DSC) allows the automatic transmission to be shifted similar
to a manual transmission.
Electronic Range Select (ERS) allows for the selection of a range of gears.
Up-Shift Light
If the vehicle has a manual transmission, it will have an up-shift light that
indicates whe ...
Tyre Dismounting and Mounting
Caution: Use a tire changing machine in order to dismount tires. Do
not use hand tools or tire irons alone in order to remove the tire from
the wheel. Damage to the tire beads or the wheel rim could result.
Caution: Do not scratch or damage the clear coating on aluminum wheels with the
tire ...