Reviewed By Stan R (Channelview, TX) Reviewed for a 1996 GMC Suburban —1/23/2012 5:57 AM
Plugged it in and it did the tuning. Noticed change in power and mpg immediately.
Reviewed By Shane P (MOORE, OK) Reviewed for a 2015 Chevy Silverado —6/10/2016 4:39 PM
Worked as advertised. My calculations say my tires are 34". With truck weight they measure about 33.5. That is the number I used and it put GPS spot on. Truck seems to be shifting back into 4 cal mode more regularly now helping to boast mpg. Worth the investment.