2003–2009 Kodiak/Topkick Duramax AMDP EFILive Custom Tune File

Fits

Note: This is the tune file only. Click here for the tune file + device.

Unlock the true potential of your medium-duty workhorse with AMDP’s Custom EFILive Tuning, engineered specifically for the 2003–2009 Chevrolet Kodiak and GMC Topkick C4500/C5500. Unlike standard pickup tuning, this calibration is optimized for the unique demands of the Kodiak chassis, providing a single-power-level solution that drastically improves horsepower and torque across the entire RPM range. Whether you are looking for a reliable efficiency bump or maximum towing capability, AMDP’s custom files refine fuel delivery and injection timing to eliminate turbo lag, sharpen throttle response, and provide the low-end grunt needed for heavy hauling.

• +25 HP: Optimized for smooth, reliable daily use with improved fuel efficiency and throttle response.
• +50 HP: Balanced performance gains that maintain excellent drivability and long-term reliability.
• +100 HP: Aggressive power upgrade designed for maximum towing capability and strong acceleration.

• Medium-Duty Optimization: Specifically calibrated for the cooling and drivetrain capacities of the C4500/C5500 platforms.
• Improved Efficiency: Optimized injection timing and fuel curves help maximize MPG under load.
• Better Response: Significantly reduces turbo lag for safer merging and easier towing.
• EFILive Precision: Utilizes the industry-standard EFILive platform for the most accurate and reliable engine control.

• Hardware Required: An EFILive V2, V3, or AutoCal device is required to flash this tuning into your vehicle.
• Single Tune: This is a single-power-level file; please specify your desired horsepower level (+25, +50, or +100) when ordering.
• Installation: Requires an existing EFILive license on your device.