OEM 2008 GMC Acadia Engine Control Module

2008 GMC Acadia Engine Control Module Parts and Q&A

• Q: How to replace the Engine Control Module (ECM) on 2008 GMC Acadia?

  A: The procedure for ecm replacement begins with turning off the ignition and using a scan tool to obtain and save the engine oil life and automatic transmission fluid life. Begin by removing the negative Battery Cable before disconnecting middle and lower electrical connectors from the ecm that are fused to the engine wiring harness. The procedure for replacing the ecm bracket requires users to first detach the engine wiring harness clip from its tab on the ecm bracket followed by unconnecting the upper electrical connector from the ecm. The pins on these connectors must not undergo human contact because electrostatic discharges will lead to damage. Use your fingers to raise the retaining tab before sliding out the ecm from its support brackets. Remove ecm bracket bolts only when needed and also detach the bracket. When installing the bracket you may need to position its slots first. Then add the bolts to fasten them at 6 n.m (53 lb in). Place the ecm onto its temporary support tabs after which it can be inserted under the retaining tab. Fit the engine wiring harness upper electrical connector to the ecm followed by installation of the engine wiring harness clip onto the ecm bracket tab when replacement of the ecm bracket occurred. The engine wiring harness middle electrical connector and lower electrical connector must be connected to the ecm before reinstalling the negative Battery Cable. A newly installed ecm requires programming to guarantee proper setup.