Reviewed By Christopher S (ZACHARY, LA) Reviewed for a 2007 GMC Sierra —3/7/2018 4:34 AM
I installed this on my 2007 GMC Sierra. Definitely can see a difference in throttle response but nothing on fuel mileage. Just like many other reviews, the instructions are a little confusing and need more details. One issue I did run into was on the first 60 mile trip after installation, the truck started idling extremely low (~250rpm). After turning the truck off and it sitting overnight, I haven't had an issue since.