Hypertech Power Programmer — 2003 GM truck/SUV 4.3, 4.8, 5.3, 6.0, 8.1L with #4L60/80 Transmissions

Adjusts your truck engines computer for maximum power and performance. May also improve fuel mileage in diesel applications. Simply plug into underdash diagnostic plug, answer a series of questions and Power Programmer does the rest! Gas engine programmers optimize air/fuel ratio and spark timing, let you tune for 87 or 93 octane fuel and optimize transmission shift points and firmness for top acceleration. Most gas engine programmers also correct speedometer/odometer readings and adjust vehicles top speed. Diesel applications gain up to 100 HP and 170 ft.-lbs. of torque and are tow-safe up to the capacity of the truck. Reads trouble codes. Powerful, yet easy to use. Can return to stock OEM programming in minutes. Limited lifetime warranty. U.S.A. This item is not returnable to Northern Tool & Equipment, all warranty issues are thru the manufacturer. For 2003 GM truck/SUV 4.3, 4.8, 5.3, 6.0, 8.1L with #4L60/80 transmissions Gas engine programmers optimize air/fuel ratio and spark timing, let you tune for 87 or 93 octane fuel and optimize transmission shift points