Hey guys I have a 2003 Chevy 2500 HD with the 6.0L. With the rising cost of gas 3.99 where I live it almost makes it hard to drive because of the fuel mileage. I got the truck to tow my camper and it does a great job of doing so! I have recently been looking into programmers to increase fuel mileage. I have only begun to start looking into them and didn't really know what I am looking for. So far I have found the Bully Dog Triple Dog GT Gas Gauge/Tuner (40410) which it says it can triple fuel economy which I would gladly spend the 470 on it if it really bumped my fuel mileage up that far. I just wanted to see if anybody had used this and if this was really true. I don't really have a need for a programmer for boosted power because the truck does a great job of pulling my camper just looking for an increase in fuel economy.