[fteam2002]

I have a 2002 gmc sierra and installed a granetelli motor sports predator flash tuner.It is used to alter your stock computers settings.You can change a variety of settings to get things such as more horsepower,different shift points,adjust for tire size changes,scan and clear codes and a variety of other things.Super easey to install,just plugs into your computer port on your truck.I bought mine at stylin.com