Diagnostic Fault Information
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.
| Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance |
|---|---|---|---|---|
| ECM B+ | U1876*, U0100 in HPCM | U1876*, U0100 in HPCM | - | - |
| ECM Ground | - | U1876*, U0100 in HPCM | - | - |
| ECM Wake Up Signal (circuit 5985) | U1876* in HPCM, U1814 in BCM | U1876*, U0100 in HPCM | - | - |
| HSGMLAN + (circuit 2500) | 1* | U1876*, U0100 in HPCM | 1* | - |
| HSGMLAN - (circuit 2501) | 1* | U1876*, U0100 in HPCM | 1* | - |
| * Other modules/DTCs will set with this fault. 1. Scan tool does not communicate with high speed GMLAN device. |
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