Reviewed By alan r (Freeport, TX) Reviewed for a 2012 GMC Sierra —1/17/2016 10:06 PM
Shipping was crazy fast and it works well
Reviewed By nathan s (MILLS, WY) Reviewed for a 2014 GMC Sierra —9/19/2015 5:38 AM
This is an awesome product. Installed right away and had a very noticeable difference just on my stock 6.2l gmc. I don't have anything modified yet but this still gave it bigger balls. The only bad part is even with the expensive price, you can only install on one vehicle at a time. You have to restore factory tune on last vehicle before new vehicle is set
Reviewed By oscar a (Norfolk, NE) Reviewed for a 2005 GMC Yukon —5/4/2012 7:05 AM
So I bought this tuner not knowing anything bout it. I was worried I might not know how to properly install tunes and mesure paeameters. Well after a while of research I found out how to installl tunes I tried the 87 octane tune. Right away I felt a huge difference my truck was awake my acceleration was different more responsive. So then I did more reseach found a guy by the name of lew or diablew tunes predator gives u the option to install custom tunes and diablo.com gives u the information you need to find people that can make a custom tune for ur car/truck. I found lew won't go into much detail but he tuned my truck with balls. There is so much thing u can do with this tuner if u have mods on ur truck a custom tune is for you. Or even stock vehicles can enjoy this great product.