GMC Sierra Engine Lean

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3 discussions

Showing Codes Po171 Bank 1 Too Lean

2003 GMC SIERRA

03 Gmc Sierra 5.3, Po300 Random/multiple Misfire , Pulled Plugs And Drivers Side Plugs Are Black Like Theyre Not Firing, Passenger Side...

1 ANSWER

Asked by richard1983

Service Engine Light Came On Scanner Said Lean Banks 1...

2001 GMC SIERRA

Service Engine Light Came On Scanner Said Lean Banks 1 And 2 Mechanic Replaced Intake Gasket Before I Pulled Out Of There Parking Lot Light...

1 ANSWER

Asked by Anonymous

Bank 1 And 2 Lean

1999 GMC SIERRA

1999 Gmc Sierra Bank 1 And 2 Lean Are Running Lean. I Have Replaced Maf And Checked The Vacuum Hoses, Air Intake, And Pcv. The Ses...

7 ANSWERS

Asked by govener71

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Backfire Buck Burning Oil Click Compression Coolant In Oil Damaged Gas Hard to Start Hesitate Idle Erratic Idle High Idle Low Idle Rough Knock Lean Locked Up Low Power Misfire Noise Not Cranking Over Not Running Oil Leak Overheat Poor Mileage Revs Up Rich Roar Runs Cold Runs Hot Runs Rough Shakes Smell Sputter Stall While Driving Stall at Idle Surge Vacuum Leak Vibration Will not shut off Worn

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