Cool 2001 Chevy Hd 2500 Hesitates Then Check Engine Light Flashes Ideas. Hello.if the check engine light is flashing, that signifies a condition, such as active engine misfiring, that should be investigated and resolved promptly to avoid further damage to engine components, not to mention the catalytic converter. Web how to fix a flashing chevy check engine light.
System needs to be tested. Web if the check engine light is flashing when accelerating, the problem is isolated to the engine block, with the crankshaft position sensor, fuel delivery, or air intake being the most probable culprits. This can be done by reading the stored fault code from the onboard computer using a diagnostic scanner.
