Heavy Tow Tune incl EFI Live SPADE

Features:

• Fits 2014 6.6L Duramax LML
• 49 state legal emissions compliant
• Emissions equipment remains fully intact
• Includes EFI Live AutoCal V3
• Designed for heavy towing applications
• Plus 40 RWHP and 72 lb ft
• SMART EGT control manages temperatures
• Air fuel limits reduce soot
• Retains factory turbo brake function
• Improved low speed trailer control
• Over 100 calibration changes
• EFILive license included for one vehicle

Confident Heavy Towing Power Without Pushing Your Limits

If your 2014 Silverado or Sierra 2500HD or 3500HD LML spends its life hooked to a trailer, this Heavy Tow Tune is built to make every pull feel more controlled. Instead of simply cranking up fuel, this calibration adds a usable plus 40 rear wheel horsepower and 72 lb ft of torque where it actually helps under load. You will notice the difference when getting a heavy trailer moving from a stop or holding speed on a long grade. Additionally, SMART EGT control works behind the scenes to manage exhaust gas temperatures so you can tow hard without watching the gauge every second. The revised pedal sensitivity makes low speed maneuvering smoother, which is a huge benefit when backing into tight driveways or job sites. Factory turbo brake functionality remains intact, giving you steady downhill control when weight is pushing from behind. It is the kind of upgrade that makes your truck feel stronger and more composed without sacrificing emissions compliance.

Precision Calibrated Heavy Tow Tuning With Included AutoCal V3

This package is engineered specifically for the 2014 6.6L Duramax LML and remains 49 state legal with all emissions equipment fully operational. The Heavy Tow calibration incorporates more than 100 changes from stock, carefully refining torque management, fuel delivery, and throttle mapping for sustained towing conditions. Built in air fuel ratio limits help control soot output while SMART EGT control automatically manages temperature during extended pulls. Designed for trailers up to 8000 pounds gross vehicle weight, this tune supports real world work applications such as construction equipment, large boats, and service bodies. The included EFI Live AutoCal V3 device allows simple handheld flashing and data logging for diagnostics and monitoring. An EFILive license is included for one vehicle, and transmission tuning is strongly recommended to optimize shift timing and torque converter lockup. When paired with proper supporting modifications, this Heavy Tow Tune delivers balanced, emissions compliant performance tailored for serious towing demands.

Fitment: 2014 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LML

Notes:

• Fits 2014 6.6L Duramax LML only
• 49 state legal with emissions intact
• Emissions equipment must remain installed
• Includes EFI Live AutoCal V3 device
• EFILive license valid for one vehicle
• Additional license required for other trucks
• Designed primarily for heavy towing use
• Light Tow tune may improve MPG
• TCM tuning strongly recommended
• California Prop 65 warning applies