just some handy info for you guys calculating mileage. i believe you can get 25mpg plus out of a truck but i doubt everyone is doing it this easy.
if you have changed gears or tire size then your speedo may be off. if even by a mph that can turn to a huge difference over hundreds of miles. and if your speedo is off then your odometer will be off. so now all results are flawed. this could be a simple change that people overlook. just a thought
as far as hand held. just spend the same money and get a custom tune. even if via email you will have better results and easy changing. plus talking to a tuner not a salesman is always nice
its just a turbo 5.3 that a couple of kids threw together
01 silverado
09 cobalt ss