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2005 Chevrolet Silverado 1500 4.8L Poor Idle Quality, MIL Lamp on
Posted to GM Driveability on 12/31/2024 15 Replies

Truck runs well cold. Truck starts hard and runs poor at idle hot. Idling low around 550 which is what data shows as desired. Truck has been then way for 40k miles (as long as customer had owned it) Data showing the truck running rich. Have tried new O2 se...

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car Vehicle Data

2005 Chevrolet Silverado 1500

VIN 1GCEC19V25
Engine4.8 L / 8 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFuel Injection / SEFI
EmissionsOBD-II Compliant
SymptomsPoor Idle Quality, MIL Lamp On
OccursHot

Trouble Codes

P0172Fuel System Too Rich (Bank 1)
P0175Fuel System Too Lean (Bank 2)
P0300Multiple Misfire Detected
Open Help Request

car Vehicle Data

2005 Chevrolet Silverado 1500

VIN 1GCEC19V25
Engine4.8 L / 8 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFuel Injection / SEFI
EmissionsOBD-II Compliant
SymptomsPoor Idle Quality, MIL Lamp On
OccursHot

Trouble Codes

P0172Fuel System Too Rich (Bank 1)
P0175Fuel System Too Lean (Bank 2)
P0300Multiple Misfire Detected