Reviewed By John S (Dallas, TX) Reviewed for a 2009 GMC Sierra —1/12/2012 8:24 PM
Increased responsiveness, torque, shift improvements,very easy to install. This is the first time I tried a programmer on a gas truck, not the same as you get from a diesel of course but it is an mild improvement over stock. I plan to eventually write programs for it. Hopes for a SC in the future.