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 GVWR
• Custom SMART EGT control manages exhaust temps
• Maintains safe temps under heavy load conditions
• Retains full factory turbo brake functionality
• Improved throttle response and pedal sensitivity
• Ideal for towing in hills, mountains, and long hauls
• Smoother trailer backing with less lurching
• Custom tuning with 100+ stock calibration changes
• Backed by expert support from DuramaxTuner.com

Make Heavy Loads Feel Lighter Every Mile

If your 2011 Duramax works as hard as you do, the Heavy Tow Tune with EFI Live SPADE is built to help you tow smarter, smoother, and with more confidence. Whether you're pulling a loaded trailer through the hills or hauling equipment across long distances, this tune gives you the low-end grunt and refined control to get the job done without stress. It adds up to 32 horsepower and 58 ft-lbs of torque at the rear wheels, which means quicker acceleration off the line and more power where it matters. But it's not just about raw numbers, it also improves pedal response and throttle feel, so the truck reacts more naturally to your input, especially in stop-and-go traffic or tight jobsite conditions. Backing up with a heavy trailer is easier too, thanks to revised pedal sensitivity that reduces lurching and gives you better control at low speeds. Best of all, this tune is 50-state legal and emissions intact, so you don’t have to compromise compliance to gain performance. For drivers who tow often and need reliability to match the load, this calibration delivers a real-world difference you’ll feel from the driver’s seat.

Precision Tuning Built For Consistent Heavy Towing

The Heavy Tow Tune is a carefully calibrated solution for 2011 Silverado and Sierra HD trucks equipped with the 6.6L Duramax LML. Designed to safely support towing up to full GVWR, it includes over 100 targeted adjustments from the factory file to deliver better throttle control, stronger low-end torque, and improved shift behavior under heavy load. The included EFI Live SPADE AutoCal v3 lets you flash the tune yourself, monitor engine performance, and log data using a simple handheld device. This tune utilizes DuramaxTuner.com's SMART EGT control to automatically manage exhaust gas temperatures, preventing overheating on long climbs or hot summer days. Air-fuel ratio limits are also dialed in to reduce soot output while keeping emissions systems fully intact and functional. It retains your factory turbo brake and requires no sensor bypasses or wiring modifications. When paired with TCM tuning, it ensures your truck stays in the right gear longer and reduces unnecessary shifting, making it easier to stay in control on grades, curves, or under load. For work trucks or towing rigs that operate year-round, this tune offers dependable performance where it counts.

Fitment: 2011 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 specifically for towing up to full GVWR
• Ideal for frequent heavy towing and long hauls
• Not intended for performance driving or racing
• SMART EGT control helps prevent high exhaust temps
• Air-fuel ratio limits reduce soot during towing
• Retains factory turbo brake and diagnostic functions
• Improves trailer control at low speeds and in reverse
• Recommended for service trucks, equipment haulers, and tow rigs
• Pair with TCM tuning for optimal shift performance