Reviewed By Rich L (COLLIERVILLE, TN) Reviewed for a 2004 GMC Yukon —7/12/2015 4:29 AM
My vehicle is over 10 yrs. old and the pick up and performance is a significant improvement. Tech guy at dealership says it takes the onboard computer a little while to learn the new changes and should improve performance. Haven't had a chance to compare gas mileage yet.