Found this thread only now (after last reply in 2011), but i think this information will be useful. I have a 2005 Silverado 1500. From that time i`ve tried a bunch of programmers cuz i love off-roading, and for me it`s very important to change from time to time my tires. So, all of these Edge Products, PPE, Gorilla, SCT - ALL of these is suck, instead of ONE that i`m using still from 2012.It`s Superchips Flashpaq F5. Damn, this boy is very accurate when it comes to calibrate the speedometer,when i change my tires.I can`t describe all the features that this programmer have, but here the review of this boy: https://4wdlife.com/programmers-for-the-chevy-silverado-53l
