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Easy fix. Check that all spark plugs and coils are in working order. Can cause catalytic converter damage if not fixed.
Boscawen, NH, US
My 2000 Silverado starts to shudder and surge at highway speeds, around 70 mph and not when I'm accelerating. Service engine light comes on and blinks but after a day will shut off. My brother told me its a misfire and check spark plug gap A few months ago the engine light came on and I had the code checked. It recommended a new fuel cap or evap canister. The light went off so I never fixed anything because it seem to run fine. Could these two this be related? It has new plugs, wires, fuel pump, filter, coil, rotor, cap. Any help?
- Brian M.,
Knoxville, TN, US