Reviewed By Derek W (GOSHEN, IN) Reviewed for a 2000 Chevy C/K 2500 —12/19/2014 2:03 PM
I have heard people whine that tuners don't do anything for gas trucks. Well don't listen to them! This thing really woke up my 5.7L Chevy and really snapped up the transmission. Quick, firm shifts, and just smoother, faster acceleration. No, it won't add 100 horsepower, but it definitely makes a noticeable difference. Also the towing mode really made a difference when i hooked up to a large trailer.
2011 GMC Sierra 1500
Reviewed By Matthew H (GRAND COULEE, WA) Reviewed for a 2011 GMC Sierra —12/19/2014 5:26 AM
Range product works well. It was easy to install. The AFM was causing my truck to "learch" when stopped at slow speeds (engine shifting from 8 to 4 cyclinders). Also had a lot of burnt oil leaving black residue near the tailpipe. The common problems you see with the GMC FLEX Fuel design. This product fixed them all. I did loose 2 mpg 19to17. More instant power overall. Good product to purchase if you decide to keep the truck instead of sell or return for one without the AFM issues.