Reviewed By charles s (CUMMING, GA) Reviewed for a 2017 GMC Sierra —6/17/2019 5:47 AM
I use this in my 1500 Denali 6.2. (Mine lights up blue, not red) I was getting some delay as my truck would shift in and out of V8 mode. It was pretty aggravating. Just plug this in, and the truck is instantly more responsive. My gas mileage has seen little to no affect, in fact, I have had a couple of tanks where I got better mileage. For a road trip, I just unplug it, and back to 22mpg. This thing works great, but it does seem a little pricy.