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2012 GMC Sierra 3500 HD SLE 6.0L Poor Idle Quality, Stall, Misfire, MIL Lamp on
Posted to GM Driveability on 2/5/2016 23 Replies

Hey there, any and all help would be greatly appreciated on this one. Customer brought truck to us after they had replaced the engine themselves and now it runs poorly. customer stated that after the USED engine was installed all was good other then lean codes...

23 Replies Received (View Replies)

  Related Documents & Media  2012 GMC Sierra 3500 HD SLE

 
Message Closed w/FIX

car Vehicle Data

2012 GMC Sierra 3500 HD SLE

VIN 1GT423CG8C
Engine6.0 L / 8 cyl / FLEX
Trans6-speed Automatic (Electronic)
DeliveryFuel Injection
EmissionsOBD-II Compliant
SymptomsPoor Idle Quality, Stall, Misfire, MIL Lamp On
OccursAlways, Under Load, on Accel, Idle

Trouble Codes

P0137Heated Oxygen Sensor (Bank 1 Sensor 2) Circuit Low Voltage
P0157Heated Oxygen Sensor (Bank 2 Sensor 2) Circuit Low Voltage
P0171Fuel System Too Lean (Bank 1)
P0174Fuel System Too Lean (Bank 2)
P0300Multiple Misfire Detected
Message Closed w/FIX

car Vehicle Data

2012 GMC Sierra 3500 HD SLE

VIN 1GT423CG8C
Engine6.0 L / 8 cyl / FLEX
Trans6-speed Automatic (Electronic)
DeliveryFuel Injection
EmissionsOBD-II Compliant
SymptomsPoor Idle Quality, Stall, Misfire, MIL Lamp On
OccursAlways, Under Load, on Accel, Idle

Trouble Codes

P0137Heated Oxygen Sensor (Bank 1 Sensor 2) Circuit Low Voltage
P0157Heated Oxygen Sensor (Bank 2 Sensor 2) Circuit Low Voltage
P0171Fuel System Too Lean (Bank 1)
P0174Fuel System Too Lean (Bank 2)
P0300Multiple Misfire Detected