89 gmc sierra 2500 5.7 the check engine light blinks rapidly with the engine running or not. What does it mean?

5

Asked by Jul 14, 2014 at 11:35 PM about the GMC Sierra 2500HD

Question type: Maintenance & Repair

Have replaced plugs, wires, dist cap and rotor, and the pcv valve. Valves clatter on
acceleration. Check engine light flashes continuously when ignition is on with engine
running or not

1 Answer

45

The check engine light is flashing a code so count the flashes and look it up

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