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 WarningFloor Carpet Drying
If the carpet or the pad or insulator is wet, use the following criteria for
drying or for replacing the components:
For a 1-piece carpet assembly bonded to a cotton or a fiber padding, replace
the entire assembly.
For a 2-piece carpet assembly with a cotton or a fiber padding, replace ...
Heater and Air Conditioning Evaporator Case Replacement
Air Conditioning (A/C) Evaporator Case Assembly Replacement
Callout
Component Name
Preliminary Procedure
Remove the instrument panel tie bar. Refer to Instrument Panel Tie
Bar Replacement.
Remove HVAC module. Refer to Hea ...
Control Valve Body Cover Replacement
Removal Procedure
Disconnect the battery negative cable. Refer to
Battery Negative Cable Disconnection and Connection.
Raise and support the vehicle. Refer to
Lifting and Jacking the Vehicle.
Remove the front bumper fascia opening lower cover.
Refer to Front Bumper ...