2011 Silverado 5.3
Had to download the program to be able to install. Wasn't difficult but thought the product should have already been up to date for install. Price is a little high for any gains in power or adjustability. I bought it mostly to disable the afm which it does do. Didn't notice any changes with regular fuel but did notice better mileage and better performance with premium.
Hopefully Help Is On The way
You hear a lot of promises about various modules. After installing this module I know the shifting has improved. I am not that interested in additional performance, I just hope that once I get to do some road time that the mileage improves. It was easy to install and the price was reasonable.