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PCM Harness Resistance

WARNING: This page is about a different car, the 2003 Oldsmobile Bravada, 2003 GMC Envoy XL, 2003 GMC Envoy, and 2003 Chevrolet TrailBlazer. However, it is still accessible from the selected car via links, so may be relevant.

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.
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