LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> GMC >> 1995 >> Forward Control 4.3 Z, Automatic >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Engine Controls - Tests W/Codes - 6.5L Diesel. >> Diagnostic Trouble Code Charts >> DTC 54, Pcm Fuel Circuit Error
April 5, 2026: LEMON Manuals is launched! Read the announcement.

DTC 54, Pcm Fuel Circuit Error

PCM FUEL CIRCUIT ERROR

This DTC indicates a fault in fueling circuit of PCM is present. Check if DTC 17 is also stored. If DTC 17 is set, refer to DTC 17 chart first. If DTC 17 is not set, replace PCM. If PCM is faulty and must be replaced, TDC OFFSET must be programmed into new PCM. When all diagnosis and repairs are complete, clear DTCS and verify for proper operation.