Heavy Tow Tune incl EFI Live SPADE

Features:

• Includes EFI Live SPADE AutoCal v3 hardware
• 50-state legal with emissions equipment intact
• Gain up to +32 HP and +58 ft-lbs
• Designed for towing up to full GVW
• Custom SMART EGT control manages exhaust temps
• Retains factory turbo brake functionality
• Improved throttle response and pedal feel
• Safer towing through hills and mountain grades
• Ideal for trailers, equipment, or heavy service loads
• Back up trailers smoothly with no lurching
• Fully custom tuning with 100+ calibration changes
• World-class support from DuramaxTuner.com experts

Tow Heavy With Confidence And Better Control

If you rely on your 2013 Duramax to pull serious weight, the Heavy Tow Tune with EFI Live SPADE gives you the confidence and control you’ve been missing. Built for trucks towing at or near GVW, this custom tune helps you get up to speed quicker, stay in the right gear longer, and manage steep grades without overworking the engine. With an increase of up to 32 rear-wheel horsepower and 58 ft-lbs of torque, it delivers just the right amount of added grunt to move heavy loads without creating unnecessary stress or high temps. SMART EGT control keeps your exhaust temperatures in check, giving you peace of mind on long uphill pulls or back-to-back hauls. It also improves throttle response and low-speed pedal control, which makes maneuvering heavy trailers or backing into tight spots far less frustrating. Whether you’re hauling construction gear, a heavy RV, or a fully loaded trailer through the mountains, this tune helps your truck work smarter, not harder. And because it’s 50-state legal with emissions intact, you can run it with confidence no matter where the job takes you.

Engineered For Safe Reliable Towing Under Load

The Heavy Tow Tune is a purpose-built calibration designed specifically for 2013 GM Silverado and Sierra HD trucks with the 6.6L Duramax LML. It features over 100 custom changes from the factory tune to improve power delivery, throttle feel, and drivability while maintaining full emissions compliance under CARB EO# D-845. This tune is optimized for consistent towing performance at weights near the truck’s maximum GVWR, with enhancements that allow you to hold gears longer and reduce unnecessary downshifting on inclines. Built-in SMART EGT control automatically manages exhaust temperatures, and air-fuel ratio limits help minimize soot production during extended towing. It retains full use of the factory turbo brake and requires no cutting, splicing, or bypassing of emissions systems. Included with the tune is EFI Live’s SPADE AutoCal v3 handheld, giving you the ability to flash your truck, log data, and perform diagnostics with ease. For owners towing heavy on a regular basis or operating work trucks in demanding conditions, this calibration offers a reliable blend of efficiency, power, and control that keeps your Duramax running strong.

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

Notes:

• Includes EFI Live SPADE AutoCal v3 hardware
• 50-state legal under CARB EO# D-845
• Emissions equipment must remain installed and functional
• Designed for towing up to full GVWR
• Not intended for performance or racing applications
• Increases power without raising EGTs dangerously
• Custom SMART EGT control helps manage exhaust temps
• Improves throttle response and low-speed trailer control
• Ideal for heavy-duty towing, service rigs, or commercial use
• Factory turbo braking is fully retained
• TCM tuning is strongly recommended for best results
• More fuel-efficient than towing with stock calibration