Reviewed By Keneth S (Jonesville, LA) Reviewed for a 2013 GMC Sierra —12/23/2014 8:37 PM
Easy to use programs in minutes. I can tell A difference. I just program with the quick tunes
Reviewed By David P (Silver Lake, KS) Reviewed for a 2013 GMC Sierra —11/6/2013 5:21 AM
Plugged in to test port in it arrived and haven't removed it. It works just as its described. Only draw back is there is a blue led light that stays on and lights up the cab. Thinking of putting black fingernail polish over it to block the light. Because of the light issue four stars.