No extra MPG's
Overall the tune was easy if you want a standard tune. I ordered this tuner in an attempt to improve fuel economy. Unfortunately I did not see any difference whatsoever and was disappointed that I could have used that $300 on fuel. Tech support first indicated that the mpg booster was in advanced tune options but finally admitted that it was not. Don't waste your money if fuel economy is your goal.
After a month of solid research i decided to go with Bully Dog. Very easy install, excellent graphics, produces the best information from your vehicle. The Tow tune turned my sluggish truck into a sports car like feel to the drivetrain, great shifting, and perfect use of the 5.3 power band. If you have the chevy trucks made between 2000 and 2007 (classic) you should have this tuner.