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2009 GMC Sierra 2500 HD WT 6.0L MIL Lamp on
Posted to GM Driveability on 6/7/2024 11 Replies

This truck came from another garage and the complaint is that the cel is on but the truck is running [...] tune up was done spark plug wire mass air flow air filter were replaced.i begin by checking the stft and ltft and they were at stft -15 and ltft -[.....

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car Vehicle Data

2009 GMC Sierra 2500 HD WT

VIN 1GTHK43K59
Engine6.0 L / 8 cyl / GAS
Trans6-speed Automatic (Electronic)
DeliveryFuel Injection
EmissionsOBD-II Compliant
SymptomsMIL Lamp On
OccursAlways

Trouble Codes

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

car Vehicle Data

2009 GMC Sierra 2500 HD WT

VIN 1GTHK43K59
Engine6.0 L / 8 cyl / GAS
Trans6-speed Automatic (Electronic)
DeliveryFuel Injection
EmissionsOBD-II Compliant
SymptomsMIL Lamp On
OccursAlways

Trouble Codes

P0172Fuel System Too Rich (Bank 1)
P0175Fuel System Too Lean (Bank 2)