Tompkins Diesel Solutions
2024-2026 Duramax HP Tuners Tuning
2024-2026 Duramax HP Tuners Tuning
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Take full control of your 2024–2026 Duramax L5P with Tompkins Diesel RTD4 custom tune files, built specifically for the E42 ECM architecture.
This single-level performance file delivers up to +150HP of clean, reliable power with no guesswork—perfect for drivers who want proven performance without switching between tunes.
Designed for the RTD4 platform and compatible with MPVi4 via Tune Delivery Network (TDN).
🔥 Key Benefits
- Up to +150HP gains
- Smooth, reliable power delivery
- Improved throttle response
- Lower exhaust gas temperatures (EGTs)
- Optimized fueling and efficiency
- Purpose-built for E42 ECM platform
⚙️ Available Power Levels
Refined factory calibration with smoother power delivery and reduced EGTs.
- +15 RWHP +10 ft-lbs
Built for towing 8,000 lbs up to GVWR with lower exhaust temperatures.
- +40 RWHP +100 ft-lbs
- Up to 100°F lower EGTs under load
Balanced towing capability with sporty drivability.
- +80 RWHP +190 ft-lbs
Fun, responsive daily driving with strong throttle response.
- +100 RWHP +200 ft-lbs
Maximum performance pushing the factory turbo to its limits.
- +150 RWHP +260 ft-lbs
🔧 Optional Transmission Tuning
Transmission tuning is available separately to increase line pressure, improve torque converter lockup, and refine shift timing—highly recommended when adding significant power.
⚠️ Important Notes
- No SOTF (Switch-On-The-Fly) support
- Compatible with RTD4
- Compatible with MPVi4 via TDN (Tune Delivery Network)
- Requires 8 credits to flash
- Transmission tuning strongly recommended for higher power levels
💪 Built for Modern Duramax Performance
Clean power, precise control, and proven reliability—Tompkins Diesel RTD4 tuning delivers exactly what your next-generation Duramax is capable of.
*For off-road use only. Supporting modifications may be required for higher power levels.
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