Reviewed By alfredo Q (PITTSBURG, CA) Reviewed for a 2002 GMC Yukon XL —4/9/2015 8:14 PM
I've been noticing the sound and power but the real plus is I have been saving gas
Reviewed By Brandon L (Mount Pleasant, SC) Reviewed for a 2015 GMC Yukon XL —10/14/2014 3:26 AM
Product showed up quick and has definitely help the engine on this large suv. I have seen and increase of 2mpg in city, but have not taken it on the highway yet. The instructions could be better, but overall I'm very pleased.