Replace Control Module
WARNING: This page is about a different car, the 2023 GMC Sierra 3500 HD and 2023 GMC Sierra 2500 HD. However, it is still accessible from the selected car via links, so may be relevant.
The replacement control module is fully programmed by the supplier and does not require SPS programming or any setup procedures.
Check for A11 Radio software/calibration updates in SPS. If updates are available reprogram the A11 Radio.