I did Black Bear tune with AFM delete. I also have the hand held tuner with the stock, tune, and the tune with AFM delete files. Runs great and getting better gas mileage in full time V8. Better city mileage and 24 mpg highway.
I will give this a shot. If you recently changed radiator read on. I has a 2007 H2 Hummer. Swapped our radiator to aluminum. This was done in the summer months. When winter rolled in it thru a code of not coming up to temp. Dealership told me it was thermostat, had them change out. Nope, not...
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