Easy To Use Performance Programmer
This programmer could not be any easier to use. I recommend going online and print a copy of the instruction manual (about 5 or 5 pages) because there were no instructions with the programmer. Most people won't need the manual, but nice to have. I went for the highest setting that requires high test gas, firm shift, and 10 mph higher shift points. I did notice a little more power, but the real winner was the transmission, with much better performance. Good buy!
Since I bought my wife her Suburban, the AFM system was driving us crazy! It would kick in and out and cause a terrible exhaust drone that bothered everyone. Since purchasing the Range AFM Disable Device, we actually enjoy taking the Suburban out and getting constant and consistent V8 power. Gas mileage has stayed about the same @ 18.5 mpg but without the lag of the AFM kicking in and getting "tripped up" on itself and not shifting correctly. I highly recommend this product!