2011 GMC Sierra 3500 HD SLE 6.6L MIL Lamp on
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...
FIX posted 5/18/2022
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Message Closed w/FIX
Vehicle Data2011 GMC Sierra 3500 HD SLE
Trouble Codes
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Message Closed w/FIX
Vehicle Data
2011 GMC Sierra 3500 HD SLE
VIN | 1GD523CL2B |
Engine | 6.6 L / 8 cyl / DIESEL |
Trans | 6-speed Automatic (Electronic) |
Delivery | Fuel Injection |
Emissions | OBD-II Compliant |
Symptoms | MIL Lamp On |
Occurs | Idle |
Trouble Codes
P0191 | Fuel Rail Pressure Sensor Circuit Performance |