Circuit/System Testing
WARNING: This page is about a different car, the 2010 GMC Sierra and 2010 Chevrolet Silverado. However, it is still accessible from the selected car via links, so may be relevant.
Observe the DTCs in the scan tool
- If DTC P0604 is set, replace the ECM.
- If DTC P0604 is not set, replace the TCM.