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	 2006 GMC Sierra 2500 HD SL 6.0L MIL Lamp on 
		
		The check engine light flashes constantly with no codes in computer. This is a natural gas bi-fuel vehicle. The manufacturer that installed the natural gas system for Chevy is no longer in business. I cannot find any Diag info. Flashes key on running or no... 
                        
                            FIX posted 1/27/2022
                             
                 
                            
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| VIN | 1GDHC24UX6 | 
| Engine | 6.0 L / 8 cyl / GAS | 
| Trans | 5-speed Automatic (Electronic) | 
| Delivery | Fuel Injection | 
| Emissions | OBD-II Compliant | 
| Symptoms | MIL Lamp On | 
| Occurs | Always | 
| Misc. | Cng | 
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 Vehicle Data
                2006 GMC Sierra 2500 HD SL
| VIN | 1GDHC24UX6 | 
| Engine | 6.0 L / 8 cyl / GAS | 
| Trans | 5-speed Automatic (Electronic) | 
| Delivery | Fuel Injection | 
| Emissions | OBD-II Compliant | 
| Symptoms | MIL Lamp On | 
| Occurs | Always | 
| Misc. | Cng | 
                            
7 Replies Received
          7 Replies Received
          
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