Changed spark plug and wires and still have p0307 code

Asked by GuruQXRPT Nov 16, 2019 at 08:42 AM about the 2006 GMC Sierra 1500 SL1 8 ft. LB 4WD

Question type: Maintenance & Repair

1 Answer
40,170

TDolby answered 4 years ago

further testing is required then for Cylinder #7. Maybe the fuel injector is faulty of leaking, and or the cylinder valve is the issue.

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