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2011 GMC Sierra 3500 HD SLE 6.6L MIL Lamp on
Posted to GM Driveability on 5/3/2022 8 Replies

We are having problems with code P0191. Have followed SI from GM guidelines, looked for chaffed wires, rubbed through wires, fretting on connections, corrosion on connections, cleaned engine/frame grounds. Ran wiggle tests, load tested wiring with headlamp...

8 Replies Received (View Replies)

  Related Documents & Media  2011 GMC Sierra 3500 HD SLE

 
Message Closed w/FIX

car Vehicle Data

2011 GMC Sierra 3500 HD SLE

VIN 1GD523CL2B
Engine6.6 L / 8 cyl / DIESEL
Trans6-speed Automatic (Electronic)
DeliveryFuel Injection
EmissionsOBD-II Compliant
SymptomsMIL Lamp On
OccursIdle

Trouble Codes

P0191Fuel Rail Pressure Sensor Circuit Performance
Message Closed w/FIX

car Vehicle Data

2011 GMC Sierra 3500 HD SLE

VIN 1GD523CL2B
Engine6.6 L / 8 cyl / DIESEL
Trans6-speed Automatic (Electronic)
DeliveryFuel Injection
EmissionsOBD-II Compliant
SymptomsMIL Lamp On
OccursIdle

Trouble Codes

P0191Fuel Rail Pressure Sensor Circuit Performance