Circuit/System Verification
WARNING: This page is about a different car, the 2010 Saturn Outlook, 2010 GMC Acadia, 2010 Chevrolet Traverse, and 2010 Buick Enclave. However, it is still accessible from the selected car via links, so may be relevant.
Test the fuel injector high voltage supply circuits and the fuel injector high voltage control circuits for a short to ground.
- If all circuits test normal, replace the ECM.