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DEF
I have this 2011 Chevy 3500 6.6L Dmax that has DEF problems. It kept setting P20EE and P249D. It will set into a power cut down mode and the truck will only run 55 mph. I checked a few things and did a ECM reflash. This seemed to fix the truck... until the nex... Login to read more. 
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| VIN | 1GC5K0C85B |
| Engine | 6.6 L |
| Trans | 6-speed Automatic (Electronic) |
Vehicle Data
2011 Chevrolet Silverado 3500 HD LT 6.6L
| VIN | 1GC5K0C85B |
| Engine | 6.6 L |
| Trans | 6-speed Automatic (Electronic) |
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