gmc Workshop Repair Guides

GMC Workshop Service and Repair Manuals

Engine Control Module|Diagrams > < Engine Control Module (ECM)
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Engine Control Module: Locations
Powertrain Control Module (PCM)

ECM/PCM Wiring

Inside passenger compartment, under RH end of I/P behind glove box.

Engine Control Module|Diagrams > < Engine Control Module (ECM)