LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> GMC >> 2003 >> Envoy RWD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - System & Component Testing - 4.2L >> Computerized Engine Controls >> Powertrain Control Module >> PCM Harness Resistance
April 5, 2026: LEMON Manuals is launched! Read the announcement.

PCM Harness Resistance

Turn ignition switch to LOCK position. Disconnect PCM and appropriate component harness connectors. Check for open or short circuits between appropriate PCM harness connector terminal and appropriate component harness connector terminal. If harness is open or shorted, repair as necessary.

Fig 1: Identifying PCM Connector C1 Terminals (1 Of 2)
G00058876Courtesy of GENERAL MOTORS CORP.
Fig 2: Identifying PCM Connector C1 Terminals (2 Of 2)
G00058878Courtesy of GENERAL MOTORS CORP.
Fig 3: Identifying PCM Connector C2 Terminals (1 Of 3)
G00058879Courtesy of GENERAL MOTORS CORP.
Fig 4: Identifying PCM Connector C2 Terminals (2 Of 3)
G00058880Courtesy of GENERAL MOTORS CORP.
Fig 5: Identifying PCM Connector C2 Terminals (3 Of 3)
G00058886Courtesy of GENERAL MOTORS CORP.
Fig 6: Identifying PCM Connector C3 Terminals (1 Of 2)
G00058887Courtesy of GENERAL MOTORS CORP.
Fig 7: Identifying PCM Connector C3 Terminals (2 Of 2)
G00058888Courtesy of GENERAL MOTORS CORP.