03 GMC sierra pulled code p0300 changed plugs truck has no pick up

Asked by Jan 14, 2017 at 03:16 PM about the 2003 GMC Sierra 1500 SLE Extended Cab LB

Question type: Maintenance & Repair

My truck was running fine got home turned it off
came out now I have no pick up

1 Answer

76,225

P0300 GMC - Cylinder Misfire Detected Random Cylinders.... Possible causes Faulty spark plug (s) Faulty ignition coil (s) Clogged or faulty fuel injector (s) Intake air leak Fuel injectors harness is open or shorted Fuel Injectors circuit poor electrical connection Ignition coils harness is open or shorted Ignition coils circuit poor electrical connection Insufficient cylinders compression Incorrect fuel pressure... The P0300 code means that a cylinder(s) is misfiring or is randomly misfiring. Start by checking for intake leaks, intake gaskets are common caused of multi-cylinder misfiring. If no leak are found the next step is to replace the spark plugs. If the problem persist more tests needs to be done to diagnose problem.

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