Reviewed By Reynaldo R (HOUSTON, TX) Reviewed for a 2010 GMC Sierra —3/3/2014 8:28 PM
Very happy with this programmer. Gained back power and some after larger tires (Nitto Trail Gapplers) I put on my 2010 GMC Sierra.
Reviewed By Kenneth H (Arab, AL) Reviewed for a 2010 GMC Sierra —8/5/2011 7:41 AM
This makes a slight difference in driving on the 87 tune. Haven't entered the 91 tune yet, but so far, the shift points are very slightly changed and makes a fair amount of difference in the truck. I wish there was a 93 octane tune!!!