Diagnostic Aids

WARNING: This page is about a different car, the 2017 Chevrolet Suburban 3500 HD. However, it is still accessible from the selected car via links, so may be relevant.

The MIL indicator flashes when there is an engine misfire.
High resistance in the circuits of the injectors may set a misfire DTC without setting an injector DTC. Test the fuel injector circuits of the affected cylinder(s) for a high resistance if you suspect a condition.
Performing the Fuel Injector Diagnosis may help isolate an intermittent condition. Refer to Fuel Injector Diagnosis .