I need to know how much my fuel milage will increase if I get a chip for my truck?

My truck is an ‘04 chevy silverado duramax disel

Tags: chip, fuel, increase, know, milage, much, need, truck

2 Responses to “I need to know how much my fuel milage will increase if I get a chip for my truck?”

1. leema288 says:

   October 18, 2011 at 8:48 pm

   3-5 miles to the gallon
2. Steve says:

   October 18, 2011 at 9:18 pm

   the chips are for horsepower not for fuel mileage. it will not increase at all but it will decrease. . . and it will smoke a little bit more