~(1 lbs. 8X5X2)~ 1996-07 GM gas Tunner 2001-05 Duramax GM Energy MAX

The Hypertech Max Energy Power Programmer optimizes spark and fuel curves to unlock hidden power potential, increasing engine efficiency, horsepower, and torque. It features speedometer calibration for different tire sizes and gear ratios, top-speed limiter adjustment, and automatic transmission shift point and firmness adjustments. The programmer also includes RPM rev limiter adjustment, cooling fan "on/off" temperature control, and functions as a diagnostic code reader to read and clear DTCs. It is designed for easy plug-and-play installation and is emissions certified 50-state legal (application specific).