Heavy Tow Tune Only for EFI Live Spade

Features:

• +40 RWHP and +72 ft-lbs torque gain
• Designed for towing up to 8,000 lbs GVW
• SMART EGT Control manages exhaust temps
• Emissions intact and 49-state legal
• Factory turbo brake remains fully functional
• Improves throttle response under heavy load
• Revised pedal feel for smoother towing
• Safe for hills, grades, and sustained pulls
• Over 100 custom calibration changes included
• No sensor or wiring modifications required
• Cleaner output than box-style programmers
• Built by trusted experts at DuramaxTuner.com

Make Heavy Loads Feel Lighter Without Losing Reliability

If your 2016 Duramax is constantly pulling trailers, equipment, or gear, this Heavy Tow Tune is the upgrade that lets your truck handle it all without breaking a sweat. Built for drivers who tow regularly and rely on consistent performance, this tune gives you an extra +40 rear-wheel horsepower and +72 ft-lbs of torque right where you need it. That means quicker acceleration off the line, smoother climbs up steep grades, and the confidence to hold your gear when you're loaded down. The throttle response feels tighter, and trailer maneuvering at low speeds becomes more controlled thanks to revised pedal sensitivity. Everything stays emissions intact, and the tune is 49-state legal, so you can tow hard without worrying about compliance. Whether you’re hauling a boat through the mountains or running a fully loaded work truck day in and day out, this tune is built to take the stress off your engine while making towing feel far less demanding. And because it comes from DuramaxTuner.com, you’re backed by a team that knows how to make power without sacrificing peace of mind.

Calibrated For Sustained Towing Performance With Built In Protection

The Heavy Tow Tune for the 2016 Silverado and Sierra 2500HD/3500HD 6.6L Duramax LML is built with over 100 custom calibration changes to deliver safe, consistent power for loaded trucks towing up to their gross vehicle weight rating. It enhances power delivery without spiking exhaust temperatures, thanks to integrated SMART EGT Control that automatically manages heat under sustained load. Air-fuel ratio limits are carefully tuned to reduce soot output, which helps keep your emissions systems cleaner over time. Throttle response is optimized for control, not aggression, allowing you to lug in gear longer and move trailers more precisely at low speeds. The tune retains full factory turbo braking functionality and is completely emissions intact, meeting 49-state legal requirements. It does not require any physical modifications or sensor changes and is installed using the EFI Live SPADE AutoCal V3 tuner through the OBD port. For trucks equipped with larger tires or drivetrain upgrades, pairing this with TCM tuning is strongly recommended to maintain proper shift strategies and clutch protection during heavy-duty use.

Fitment: 2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LML

Notes:

• Compatible with 2016 GM 2500HD/3500HD 6.6L Duramax LML
• This is a tune-only product, hardware is not included
• EFI Live SPADE (AutoCal V3) device is required for installation
• Requires EFiLive license if using an existing device
• Must provide Serial Number and Auth Code for existing SPADE device
• This tune is 49-state legal and emissions intact
• Designed specifically for towing up to 8,000 lbs GVW or higher
• Not intended for casual or light towing applications
• Ideal for commercial, fleet, or high-mileage tow operations
• SMART EGT Control helps manage safe towing temperatures
• No sensor or wiring modifications are required
• Recommended to pair with TCM tuning for improved shifting
• DuramaxTuner.com provides full phone support for setup