Technical Service Bulletins

Chafing Chevy

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Chafing Chevy

This bulletin applies to 2014 Chevy Equinox vehicles. In “rare” cases, customers may comment that the MIL is on, accompanied by poor performance/reduced power. Technicians may find DTC P0641 or various other codes set.

Not all of the effects noted may be experienced. However, the different effects and driver notifications may be caused by one of the wires in the ECM harness being chafed or cut. According to GM, due to the cause of the condition, and the position of the wires in the harness, “it is unlikely that more than one circuit will be affected.”

Technicians should inspect the ECM harness (off of Engine Control Module X1 connector) for any damaged wires at the location shown in the accompanying photos. If a repair is made, wrap woven polyester electrical tape (PET) or equivalent anti-abrasion tape around the wires.

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