Circuit/System Verification
WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2008 GMC Yukon XL, 2008 GMC Yukon, 2008 Chevrolet Tahoe, 2008 Chevrolet Suburban, and 2008 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.
- Verify that DTC B137A is not current in the serial data gateway module (SDGM).
- If the DTC is current in the SDGM, refer to Diagnostic Trouble Code (DTC) List - Vehicle .
- Verify that DTC U1815 is not set current only in the HPCM.
- If the DTC is current in the HPCM only, replace the drive motor power inverter module (PIM).