Diagnostic Fault Information
WARNING: This page is about a different car, the 2009 GMC Sierra, 2009 GMC Cab & Chassis Sierra, 2009 Chevrolet Silverado, and 2009 Chevrolet Cab & Chassis Silverado. 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 |
|---|---|---|---|---|
| BECM B+ (circuit 4240) | U0146* in PSCM | U1878* in HPCM, U0111 in SDGM | - | - |
| BECM Ground (circuit 2751) | - | U1878* in HPCM, U0111 in SDGM | - | - |
| BECM Communication Enable Signal (circuit 5986) | U1878* in HPCM, U2099 in BCM | U1878* in HPCM, U0111 in SDGM | - | - |
| HSGMLAN + (circuit 2500) | 1* | U1878* in HPCM, U0111 in SDGM | 1* | - |
| HSGMLAN - (circuit 2501) | 1* | U1878* in HPCM, U0111 in SDGM | 1* | - |
| HPCM Ignition (circuit 2139) | P2534 | P2534 | U1875* in HPCM, B1453 in SDGM | - |
| * Other modules/DTCs will set with this fault. 1. Scan tool does not communicate with high speed GMLAN device. |
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