gmc Workshop Repair Guides

GMC Workshop Service and Repair Manuals

Main Relay (Computer/Fuel System) > < Powertrain Control Module (PCM)|Page 2731
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1. Install the PCM into the PCM mounting bracket, allowing the tabs to fully engage.

2. Connect the PCM harness connectors (2) to the PCM body (3).
3. If a new PCM is being installed, the PCM must be programmed. Refer to Service Programming System (SPS) in Programming.  See: Testing and

Inspection/Programming and Relearning

4. Perform the crankshaft position (CKP) system variation learn procedure. Refer to CKP System Variation Learn Procedure or to CKP System

Variation Learn Procedure.  See: Testing and Inspection/Programming and Relearning

Main Relay (Computer/Fuel System) > < Powertrain Control Module (PCM)|Page 2731