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2011 GMC Sierra 2500 HD SLT 6.6L Will not clear DEF
Replaced GM DEF heater module in tank. New [...] GM part Cleared all codes but keeps DEF warning lamp on and highway speed limited. Tried looking for more codes after customer drove short trips for three days. No codes and no change. DEF warning lamp stays...
FIX posted 5/23/2024
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Message Closed w/FIX
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| VIN | 1GT221C82B |
| Engine | 6.6 L / 8 cyl / DIESEL |
| Trans | 6-speed Automatic (Electronic) |
| Delivery | Fuel Injection / Diesel |
| Emissions | OBD-II Compliant |
| Symptoms | Will Not Clear Def |
| Occurs | Always |
Message Closed w/FIX
Vehicle Data
2011 GMC Sierra 2500 HD SLT
| VIN | 1GT221C82B |
| Engine | 6.6 L / 8 cyl / DIESEL |
| Trans | 6-speed Automatic (Electronic) |
| Delivery | Fuel Injection / Diesel |
| Emissions | OBD-II Compliant |
| Symptoms | Will Not Clear Def |
| Occurs | Always |
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