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.
Works as expected
Intuitive interface. Easy to use. Made changes to tire size. Plan on a regear in the future. Was able to turn off TPMS. I was hoping to be able to create a increased idle setting for winching, but you must have the tuner plugged in when you want to increase engine speed. Did take a good 30 mins to flash on a new 87 octane tune. Did notice a little increase in throttle response, but not blazing.