| well the higher the setting the better the fuel economy it makes the truck go down the road easier. When towing i would only run setting 1 or 2 to be safe on the trans. Timing being advanced is what helps mileage but the more power the better mileage as long as you have self control so dont push pedal to the floor.
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07.5 Summit White RCLB. DPF deleted, Cobalt gauges, Banks intake, Fire & ICE. |