Multiple DTCs Set Due to Engine Harness Damage

Multiple intermittent Malfunction Indicator Lamps (MIL) may be illuminated and a loss of communication with several modules, including several U-codes (DTC) set, may be found on some 2016-2018 Colorado and Canyon models equipped with the 2.5L engine (RPO LCV).

These conditions may be caused by the main engine wiring harness chafing on the low side air conditioning pipe on the left side of the engine, below the exhaust manifold. (Fig. 15)

Fig. 15

Repair the wiring harness following the instructions in the appropriate Service Information and secure the harness away from the pipe.

– Thanks to Charles Hensley

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