Heavy Tow Tune Only for EFI Live Spade

Features:

• Safe for heavy towing applications
• Emissions intact and 50 state legal
• +40 RWHP and +72 ft-lbs torque
• SMART EGT Control manages exhaust temps
• Designed to tow up to 8,000 lbs GVW
• Factory turbo brake remains functional
• Improved low-speed trailer maneuvering
• Reduces soot with controlled air-fuel ratios
• Pedal sensitivity calibrated for towing
• Custom tune with 100+ stock adjustments
• Compatible with EFI Live AutoCal V3
• Better fuel efficiency compared to stock when towing

Towing Heavy Should Feel Confident Not Stressful

If you’re putting in long hours behind the wheel with a trailer in tow, this Heavy Tow Tune is built to make your job smoother and safer. Designed specifically for the 2014 Duramax LML, it brings just the right amount of power where you need it most, without pushing your engine or emissions system too hard. Whether you’re pulling equipment, a loaded-down service bed, or hauling through tough grades, you’ll feel the extra muscle the moment you hit the throttle. The +40 RWHP and +72 ft-lbs torque gains give you the boost to get moving faster, even when fully loaded. Backing up a trailer is easier too, thanks to refined pedal sensitivity and better low-speed control. Best of all, this tune is legal in all 50 states and keeps your emissions system completely intact. If you rely on your truck to earn a living, this tune helps you do it more efficiently and with less strain.

Calibrated To Tow Heavy With Precision And Control

This Heavy Tow Tune is custom-built to help your truck handle heavy loads without compromising safety or compliance. It uses over 100 refined calibrations to adjust factory parameters for towing performance while keeping emissions intact and legal nationwide. SMART EGT control keeps exhaust temperatures in check, reducing stress on your motor during long hauls or uphill climbs. Air-fuel ratios are dialed in to limit soot production, so you get more power with less mess. You’ll maintain full factory turbo braking, giving you added confidence while descending grades or maneuvering tight spaces. Designed for towing at or near the 8,000 lb GVW range, this tune balances power delivery for smooth, predictable performance. It's ideal for trucks with factory hardware, and it integrates cleanly with the EFI Live SPADE platform for easy installation and updates. If you’re looking to tow smarter and safer, this tune is ready to go to work.

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

Notes:

• Safe for towing up to full GVW rating.
• Requires EFI Live SPADE hardware to work.
• Emissions equipment must stay installed.
• Light Tow Tune is better for lighter loads.
• Made for serious or commercial towing use.
• SMART EGT control keeps temps in check.
• Great for hills, mountains, and long hauls.
• Needs EFI Live license if not already owned.
• Transmission tuning strongly recommended.
• Boosts usable power, not peak horsepower.
• May need extra tuning with major upgrades.
• Abuse without monitoring can cause damage.