GMC Sierra P Codes (Powertrain) P0300 - P0399 P0303

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2002 GMC Sierra Cylinder 3 Misfire- Diagnostic Code...

2002 GMC SIERRA

What Do You Recommend On Trouble Shooting Since My Diagnostic Code At Autozone Read Cylinder 3 Misfire. Code# P0303 How Do I Locate...

3 ANSWERS

Asked by ozarks76

2001 GMC SIERRA

Pulling Code P0303, Replaced Distributor And Rotor, Spark Plugs And Wires, Crankshaft Position Sensor, Fuel Pump Pressure Tested At 55 Psi...

1 ANSWER

Asked by Jphillips120v

2000 GMC SIERRA

Ok, Changed Wires, Plugs. Still Get A Po303 Code. Engine Is Unsteady At Idle. Runs Fine For A Second Then Boom A Miss. Does This About...

13 ANSWERS

Asked by Harrison1

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