Heavy Tow Tune incl EFI Live Spade

Features:

• Includes EFI Live AutoCal V3 hardware
• 50 State Legal emissions intact tuning
• Designed for towing up to 8,000 lbs GVW
• Increases power by +40 RWHP and +72 ft-lbs
• Custom SMART EGT Control manages temps
• Air fuel ratio calibrated to reduce soot
• Maintains full factory turbo braking
• Improved throttle response and pedal feel
• Better low-speed trailer maneuverability
• No wiring hacks or sensor tampering needed
• Back up trailers smoothly without lurching
• Great for heavy-duty and long-distance towing

When You Tow Big You Need Real Power

If you’re towing serious weight and want your truck to respond with confidence, this Heavy Tow Tune is built with you in mind. It’s not just about adding horsepower, it’s about unlocking smarter power where and when you need it. Whether you're hauling equipment through mountain passes or pulling a trailer across long highway stretches, this tune is designed to help your Duramax stay cooler, shift smoother, and pull harder. You'll feel stronger throttle response, better low-speed control, and the peace of mind that comes from knowing your factory emissions equipment stays intact. It also includes the EFI Live AutoCal V3 hardware, making setup straightforward with no extra tools or gimmicks. You’ll notice improved driveability whether you're crawling through job sites or cruising through hills fully loaded. It’s tuning made for drivers who rely on their truck to do real work, not just look good in the driveway.

Calibrated To Tow With Precision And Protection

This Heavy Tow Tune packs over 100+ custom calibration changes that work together to create a safe, reliable boost in towing performance. With a gain of +40 RWHP and +72 ft-lbs of torque, the tune delivers noticeable muscle without spiking EGTs, thanks to built-in SMART EGT Control. The air-to-fuel ratio is fine-tuned to reduce soot production and keep the truck running clean under heavy load. Factory turbo braking remains fully functional, helping you maintain downhill control while loaded. Pedal sensitivity is revised for better low-speed trailer maneuvering, especially useful in tight job sites or backing up a trailer. You also get the included EFI Live AutoCal V3, which acts as both your tuning device and diagnostic tool, capable of flashing updates and logging real-time data. Everything is designed to protect your powertrain while optimizing your truck’s ability to tow heavy with consistency and control.

Fitment: 2015 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LML

Notes:

• Includes EFI Live AutoCal V3 hardware and license.
• 50 State Legal, CARB approved (E.O. No. D-845).
• Emissions equipment remains intact, no deletes required.
• Specifically designed for towing 8,000 lbs. up to GVW.
• Not ideal for light towing, better MPG available with Light Tow Tune.
• Recommended for over-the-road drivers and heavy-duty towing.
• Custom tuning includes over 100+ calibration changes from stock.
• Custom SMART EGT Control manages exhaust temperatures safely.
• Uses factory turbo braking, retains OEM safety features.
• No need to hack or modify wiring harnesses or sensors.
• Ideal for owners pulling boats, construction equipment, or service rigs.
• Better performance and less soot than traditional box tuners.
• World-class customer service available for troubleshooting or questions.