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 WarningInstrument Panel Lower Trim Pad Cover Replacement (With AAL)
Instrument Panel Lower Trim Pad Cover Replacement
Callout
Component Name
Preliminary Procedure
Disable the SIR system. Refer to SIR Disabling and Enabling.
1
Instrument Panel Lower Trim Pad Fastener ...
Quarter Outer Panel Pressure Relief Valve Replacement
Quarter Outer Panel Pressure Relief Valve Replacement
Callout
Component Name
Preliminary Procedure
Remove the rear bumper fascia. Refer to Rear Bumper Fascia Replacement
1
Quarter Outer Panel Pre ...
Low and Reverse and 1-2-3-4 Clutch Housing, and 1-2-3-4 Clutch Plate Installation
(6T30)
Low and Reverse and 1-2-3-4 Clutch Housing, and 1-2-3-4 Clutch Plate
Installation
Callout
Component Name
1
Low and Reverse and 1??? Clutch Housing
Note: The longer legs face the bottom of the case and the
...