2001 gmc 6.0 3500 dually
I have a 2001 gmc dually 3500............. message - misfire cylinder 6 after putting gas in from a station I do not usually fill at. Replaced plugs, wires #6 coil, injector, still getting same msg. rough idle, power loss, am noticing headlights dim when I accelerate at high speeds. Headlights have been doing that before the #6 problem. possible PCM problem???
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Check compression first before thinking it's electronic related.
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