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Home >> Chevrolet >> 2010 >> Suburban K2500 >> Repair and Diagnosis >> Engine Performance >> System >> Data Communication System >> Diagnostic Information and Procedures >> DTC U1879 >> Diagnostic Fault Information
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Diagnostic Fault Information

Circuit Short to Ground Open/High Resistance Short to Voltage Signal Performance
ECM B+ U1879*, U0100 in HPCM U1879*, U0100 in HPCM - -
ECM Ground - U1879*, U0100 in HPCM - -
ECM Wake Up Signal (circuit 5985) U1879* in HPCM, U1814 in BCM U1879*, U0100 in HPCM - -
HSGMLAN + (circuit 2500) 1* U1879*, U0100 in HPCM 1* -
HSGMLAN - (circuit 2501) 1* U1879*, 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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