i have an 05 silverado, shutters @ 60mph, and check engine light goes on, if i tap the gas a few times it sems to stop. I took it in had spark plugs, wires, coil pack changed. no better....so now i just had new rot cap, and co2 sensor put on and throttle checked and cleaned...guarenteed me it was fixed, drove maybe 2 miles for light and shutter to start again....any ideas??
If you still have a code that is a misfire in cyl. #6, then that coil pack, the wiring harness or plug is faulty. Take it back to the garage.
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