Hypertech Power Programmer III for 05-06 Dodge Durango, Jeep Commander XK & Grand Cherokee WK with 5.7L HEMI

When you connect the Power Programmer to your vehicle, its "smart" program instantly recognizes your vehicle's powertrain by reading the Vehicle Identification Number (VIN). The VIN contains specific information on the engine, transmission, and drivetrain, which the Power Programmer decodes before it downloads the Power Tuning program that is precisely tailored to your car or truck. The Power Programmer lets you choose Hypertech's Power Tuning program for regular 87 octane or premium 93 octane gasoline. Both options improve performance without detonation. After the tuning program is selected, the Programmer automatically installs the program and allows you to access and reprogram the vehicle's computer to function properly with aftermarket components such as non-stock tire sizes and rear-end gear ratios. The Power Programmer is incredibly powerful, but it is also incredibly easy to use. Reprogramming does not require any tools or knowledge of cars or even computers. Plus, you can return to OEM (stock) programming in just minutes. FEATURES (depending on year, make and model) Hypertech Power Tuning Tunes the engine for maximum power and performance, plus potential gas mileage improvements Three-Stage Power Tuning Special Three-Stage Tuning for Select Vehicles Dual Fuel Tuning Lets you choose optimized tuning for 87 octane or 93 octane fuel Engine Rev Limiter Extends the engine's RPM range for a wider power band Cooling Fan On/Off Temperatures Permits use of low-temperature thermostat for cooler, denser intake charge and lower engine operating temperature Transmission Shift Points Optimizes shift points by speed and RPM for maximum acceleration Transmission Shift Firmness Firmer full-throttle gear changes for faster acceleration Top-Speed Limiter Allows the vehicle's top speed to be matched to the speed rating of factory-approved high-performance tires Speedometer/Odometer Correction Automatically corrects speedometer and odometer readings for non-stock tire sizes and/or non-stock rear-end gear ratios (accurate odometer readings are required by law) Read and Clear DTC's