POWER PROGRAMMER III� An automotive tuning computer that you simply plug into the diagnostic port in your vehicle! Enjoy the performance, power gains and potential gas mileage improvements Reprograms engine control unit (ECU) to maximize horsepower and torque gains throughout engine RPM range. Raises top-speed limiter to match speed rating of high-performance tires. Adjusts transmission shift points and RPM "rev" limiter. Lowers on/off temperatures of cooling fan. Automatically recalibrates speedometer, odometer and transmission shift points for custom tire sizes and axle ratios. CARB EO #D-260-3. Applications:1999 GMC Yukon with 4. 3L; 5. 0L; 5. 7L or 7. 4L Engine,1999 GMC Suburban with 4. 3L; 5. 0L; 5. 7L or 7. 4L Engine,1999 GMC S-15 Pickup with 4. 3L; 5. 0L; 5. 7L or 7. 4L Engine,1999 GMC C/K Pickup with 4. 3L; 5. 0L; 5. 7L or 7. 4L Engine,1999 Chevrolet Tahoe with 4. 3L; 5. 0L; 5. 7L or 7. 4L Engine,1999 Chevrolet Suburban with 4. 3L; 5. 0L; 5. 7L or 7. 4L Engine,1999 Chevrolet S10 Blazer with 4. 3L; 5. 0L; 5. 7L or 7. 4L Engine,1999 Chevrolet S10 Pickup with 4. 3L; 5. 0L; 5. 7L or 7. 4L Engine,1999 Chevrolet C/K Pickup with 4. 3L; 5. 0L; 5. 7L or 7. 4L Engine |