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 WarningRadio Controls without Touchscreen
The buttons used to control the radio are:
P /VOL: Press to turn the radio on and off.
RADIO/BAND: Press to choose between AM, FM, and SiriusXM®, if equipped.
Push/MENU/TUNE Knob: Turn to navigate the available menus. Turn to search for
stations.
INFO: Press to display additional information ...
Wireless Communication Interface Antenna Replacement
Wireless Communication Interface Antenna Replacement
Callout
Component Name
Preliminary Procedure
Remove the communication interface module. Refer to
Communication Interface Module Replacement
1
...
Air Inlet Valve Actuator Replacement (LHD)
Air Inlet Valve Actuator Replacement
Callout
Component Name
Preliminary Procedures
Remove the instrument panel compartment. Refer to Instrument Panel
Lower Compartment Replacement.
Reposition any wiring or hoses to gain a ...