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	 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 
	   
	   
	   
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| 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 | 
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 | 
                            
8 Replies Received
          8 Replies Received
          
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