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2009 Chevrolet Express 2500 6.0L Poor Idle Quality, Misfire, MIL Lamp on
Posted to GM Driveability on 11/9/2010 13 Replies

This problem occurs intermittentently at idle. Seems worse after it gets hot while driving and returns to idle at stops. Its missfiring no.1 cylinder bad when this happens. No.5 missfire counter is around 6 and no.7 missfire counts are around 7. When this happ...

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  Related Documents & Media  2009 Chevrolet Express 2500

 
Message Closed w/FIX

car Vehicle Data

2009 Chevrolet Express 2500

VIN 1GCGG25U84
Engine6.0 L / 8 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFuel Injection / RETURNLESS ON DEMAND DESIGN
EmissionsOBD-II Compliant
SymptomsPoor Idle Quality, Misfire, MIL Lamp On
OccursHot, Idle, After a Hot Soak, Intermittently

Trouble Codes

P0172Fuel System Too Rich (Bank 1)
P0300Multiple Misfire Detected
Message Closed w/FIX

car Vehicle Data

2009 Chevrolet Express 2500

VIN 1GCGG25U84
Engine6.0 L / 8 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFuel Injection / RETURNLESS ON DEMAND DESIGN
EmissionsOBD-II Compliant
SymptomsPoor Idle Quality, Misfire, MIL Lamp On
OccursHot, Idle, After a Hot Soak, Intermittently

Trouble Codes

P0172Fuel System Too Rich (Bank 1)
P0300Multiple Misfire Detected