This bulletin applies to 2018 GMC Canyon trucks equipped with a 2.5L engine and Terrain vehicles equipped with a 2.0L or 1.5L engine. On some vehicles, an electrical connection in the circuit board may fail in the engine control module.
This bulletin applies to 2019 Chevy Colorado trucks equipped with a 2.8L turbo diesel engine. Some customers may comment that the MIL is illuminated. They may also note that a “Service Emission System” message is displayed in the driver information center.