Reviewed By jonpaul y (Dover, FL) Reviewed for a 2002 GMC Yukon —5/28/2011 10:31 AM
put it in my truck right away the improvement was great the fuel improvement was about 2 to 3 mpg and proformance was great.
Reviewed By Robert L R (VALLEY, NE) Reviewed for a 2000 GMC Yukon —2/12/2016 9:15 AM
This is by far the first, best upgrade I've made to my Denali! Fairly easily installed (no thanks to GMC) and my 5.7 Vortec started right up with no codes. I experienced immediate increases in throttle response and overall power and drivability. Unbelievably, after a week or so of driving the vehicle, the power and responsiveness approved again! Puts me in mind of the old EPROM chips. I highly recommend this product to anyone looking for low dollar extra horses and low-end torque !