Diagnostic Fault Information
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.
| Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance |
|---|---|---|---|---|
| Wake Up Signal | U1814* in BCM | U1812* in HPCM | U209A* in SDGM | - |
| Wake Up Signal | B137A* in SDGM |
U1812** | 1 | - |
| SDGM B+ | U1862* and U1812 in HPCM | U1862* and U1812 in HPCM | - | - |
| SDGM ground | - | U1862* and U1812 in HPCM | - | - |
| * Other modules will set other DTC with this fault. ** Open at SDGM or BECM will set DTC U1812 in HPCM. Open at PIM will set DTC U189A in the HPCM. 1. Parasitic drain on battery, and may set DTC U1875, U1876, U1878, U1879 as history in the HPCM with the key ON, or as current with the key OFF. |
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