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 Suspension
Specifications
Front Suspension Components
Drivetrain and Front Suspension Frame
Front Stabilizer Shaft
Drivetrain and Front Suspension Frame Rear Insulator
Front Stabilizer Shaft Link
Front Suspension Strut Insulator Assembly
Front Spring
Shock Absorber Assembly
Front Whe ...
Rear Side Door Wiring Harness Replacement
Preliminary Procedure
Remove the rear side door inner panel trim. Refer to Rear Side Door Trim
Replacement.
Rear Side Door Wiring Harness
Warning: Unless directed otherwise, the ignition and start switch must be
in the OFF or LOCK position, and all electrical
loads must be OFF befor ...
Voice Recognition
Voice recognition allows for hands-free operation of the infotainment system
features.
Voice recognition can be used when the radio is on or when Retained Accessory
Power (RAP) is active.
See “Retained Accessory Power (RAP)” in the owner manual. The system maintains
a minimum volume level.
...