Heavy Tow Tune Only for EFI Live Spade

Features:

• Safe for towing up to 8,000 lbs
• Emissions equipment remains fully intact
• 50 State Legal compliance
• +40 RWHP and +72 ft-lbs torque gain
• SMART EGT Control manages exhaust temps
• Improved throttle and pedal sensitivity
• Smoother trailer maneuvering at low speeds
• Designed for hills, mountains, and heavy loads
• Retains full factory turbo braking
• Over 100+ calibration changes from stock
• No wiring or sensor modifications required
• Includes EFI Live AutoCal V3 tuner

Make Heavy Hauling Feel Light Every Time

If you're regularly towing serious weight and want a tune that gives you reliable power without putting your engine at risk, this Heavy Tow Tune is built for the job. Whether you're pulling a loaded trailer through steep grades or hauling equipment across long distances, this tune gives your 2013 Duramax the muscle it needs without sacrificing drivability. It adds a clean +40 RWHP and +72 ft-lbs of torque, helping you get up and moving quickly with less lag and more control. You'll still retain full functionality of your factory turbo brake, which is key for safety on the downhill side. And thanks to refined pedal sensitivity and low-speed trailer maneuvering features, backing up or navigating tight spots is much easier. The custom tuning is designed to limit soot and manage EGTs efficiently, so your emissions equipment stays healthy and intact. This is a great choice for anyone who depends on their truck to tow consistently without dealing with the stress of overheating or sluggish response. Whether you're running a rig for work or pulling your boat to the lake, this tune gives you the confidence to go farther with less worry.

Built For Towing Demands Without Sacrificing Control

Technically speaking, this Heavy Tow Tune is engineered with over 100+ changes to your truck’s stock calibration, aimed at balancing performance, safety, and efficiency. Designed for towing loads up to 8,000 lbs GVW, it works by optimizing the air-fuel ratio to reduce soot and keeping exhaust gas temperatures in check using built-in SMART EGT control. The tune enhances torque delivery right where you need it most, so you can lug confidently in the gear of your choice. It also smooths out throttle response and shift timing for a more controlled driving experience, especially under load. The factory turbo braking system remains untouched, preserving one of your truck’s most valuable downhill towing features. This tune does not require any invasive hardware modifications, so your emissions systems remain intact and fully compliant. It pairs especially well with TCM tuning, which helps ensure your transmission holds gear longer and shifts more efficiently under added stress. With all of this working behind the scenes, your truck stays in its powerband without constantly hunting for the next gear.

Fitment: 2013 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LML

Notes:

• This tune is designed for heavy towing, up to 8,000 lbs GVW.
• Emissions equipment remains intact, fully emissions compliant.
• 50 State Legal, approved under EO Number D-845.
• Delivers +40 RWHP and +72 ft-lbs torque increase.
• Built-in SMART EGT Control helps manage exhaust temps.
• Air-to-fuel ratio tuning helps reduce soot output.
• Retains factory turbo braking functionality.
• Requires EFI Live SPADE hardware (AutoCal V3).
• SPADE hardware includes an EFILive license.
• This tune is best suited for trucks used frequently for towing.
• Recommended for use with TCM tuning for optimal results.
• Not ideal for towing lighter loads where MPG is a priority, consider Light Tow tune instead.
• Compatible with trucks using stock emissions and fuel systems.
• Designed for safe and smooth low-speed trailer maneuvering.
• Not intended for race use or aggressive driving without proper supporting mods.