Reviewed By Justin H (LITTLE ROCK, AR) Reviewed for a 2014 GMC Sierra —8/30/2016 3:55 PM
I have been buying hypertech for many years great programmer.
Reviewed By Bill H (Ponchatoula, LA) Reviewed for a 2011 GMC Sierra —5/13/2016 6:27 AM
So far I like the performance but really didn't get a fuel mileage increase and also needs some better instructions on how to adjust all the settings. For example how to adjust shift points for certain program's