gmc Workshop Repair Guides

GMC Workshop Service and Repair Manuals

Main Relay (Computer/Fuel System) > < Engine Controls - Aftermarket Accessory Usage|Page 2997
Page 3
background image

3. Connect the engine wiring harness electrical connectors (2) to the ECM (1).
4. Connect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection   (See: Starting and Charging/Battery/Battery

Cable/Service and Repair).

5. If a new ECM was installed, program the ECM. Refer to Control Module References   (See: Testing and Inspection/Programming and Relearning).
6. Using a scan tool, set the remaining engine oil life.

Main Relay (Computer/Fuel System) > < Engine Controls - Aftermarket Accessory Usage|Page 2997