Heavy Tow Tune Only for EFI Live Spade

Features:

• Heavy tow tune built for serious haulers
• 50-state legal with emissions equipment intact
• Safe for towing up to 8,000 lbs GVW
• Boosts power by +40 RWHP and +72 ft-lbs
• Designed to reduce EGTs under load
• Improved pedal response for better control
• Ideal for hills, grades, and long hauls
• Factory turbo brake remains fully functional
• Customized tuning with 100+ calibration changes
• Minimizes soot with optimized air-fuel ratios
• SPADE EFI Live AutoCal V3 required
• Perfect for towing rigs, boats, or equipment

Built To Haul When The Road Gets Tough

If your 2011 Duramax is your go-to for towing big loads, the Heavy Tow Tune from DuramaxTuner.com is the kind of upgrade that makes your job a whole lot easier. This isn’t about flashy numbers or gimmicks, it’s about delivering smooth, reliable power exactly when and where you need it. With up to +40 rear-wheel horsepower and +72 ft-lbs of torque, this tune helps get your trailer moving faster and keeps it steady when climbing grades or navigating heavy traffic. Whether you're hauling construction equipment, pulling a boat, or running a loaded service truck, this calibration is built with real-world towing in mind. You'll get improved throttle response, smarter power delivery, and a tune that lets you lug in the gear you want without fighting the truck. Plus, your factory turbo brake stays fully functional, giving you extra confidence on downhill stretches. If towing is part of your daily grind, this tune is built to work as hard as you do.

Precision Tuning That Keeps Your Duramax In Control

The DT8150010006010 Heavy Tow Tune is custom-built for the 2011 GM 6.6L LML Duramax and is designed to help you safely handle demanding tow loads without compromising emissions compliance. Fully 50-state legal under EO Number D-845, this calibration is emissions intact, meaning you won't be removing or tampering with your factory emissions equipment. The tune includes more than 100 adjustments to factory settings, including fuel delivery, pedal sensitivity, turbo management, and air-fuel ratio optimization. That helps reduce soot, manage EGTs under heavy load, and keep your engine running safely mile after mile. It's engineered to work hand-in-hand with your EFI Live SPADE (AutoCal V3) device, which is required to flash and monitor your tune. For best results, transmission tuning is strongly recommended, especially if your truck is running larger tires, a modified turbo, or other performance upgrades. This calibration is also compatible with ZF6 manual transmission trucks, with tuning mapped to help you shift cleanly and make power where it counts.

Fitment: 2011 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LML

Notes:

• Designed specifically for 2011 6.6L LML Duramax engines
• Only includes the Heavy Tow custom tune
• SPADE EFI Live AutoCal V3 is required to flash
• EFI Live license must be purchased if hardware not included
• 50-state legal with CARB EO Number D-845
• Emissions equipment must remain installed and functional
• Recommended for towing loads up to 8,000 lbs GVW
• Ideal for customers who tow frequently or in challenging conditions
• Custom tuning includes 100+ calibration changes from stock
• Transmission tuning is strongly recommended for best performance
• Compatible with ZF6 manual transmission trucks
• World-class phone support available after purchase