Diagnostic Aids
WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2012 GMC Yukon XL, 2012 GMC Yukon, 2012 Chevrolet Tahoe, 2012 Chevrolet Suburban, and 2012 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.
- If the SDG module becomes inoperative, the drive motor generator battery control module will set DTC U1862 and other modules will set loss of communication DTCs against the SDG module.
- If serial data is lost between the SDG module and the drive motor generator battery control module multiple modules will set loss of communication DTCs against the drive motor generator battery control module.