Diagnostic Aids
WARNING: This page is about a different car, the 2017 GMC Acadia. However, it is still accessible from the selected car via links, so may be relevant.
Low voltage or a momentary loss of power or ground to the ECM may cause a DTC to set. Verify the following:
- The battery cables are clean and tight, and the battery is fully charged. Refer to Battery Inspection/Test .
- The ECM ground circuits do not have an open or high resistance.
- The ECM power circuits do not have an open, short to ground, or high resistance.