have a po300 code

Asked by Sep 20, 2016 at 11:30 AM about the 2003 GMC Sonoma SL Ext Cab 4WD

Question type: Maintenance & Repair

i have worked with a couple of gm people online no success.truck seems to
run good. have tried lots of parts cap rotor wires plugs coil fuel pump fuel
regulator map sensor maf sensor intake gaskets and used in rail cleaner on
injectors .i also replaced distributor.

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