Heavy Tow Tune incl EFI Live SPADE

Features:

• Includes EFI Live SPADE AutoCal V3 device
• Designed for towing up to 8,000 lbs GVW
• +40 RWHP and +72 ft-lbs torque increase
• 50-state legal with emissions equipment intact
• SMART EGT Control manages exhaust temperatures
• Factory turbo brake remains fully functional
• Improved low-speed control while maneuvering trailers
• Revised pedal sensitivity for better towing response
• Air-fuel ratio tuned to reduce soot production
• More efficient and cleaner than box programmers
• Includes over 100 custom calibration changes
• Ideal for frequent towing in hills or mountains

Built To Handle The Loads That Push Your Truck Hard

If your 2014 Duramax spends more time towing than not, this Heavy Tow Tune is built to help you do it with confidence and control. Whether you're hauling equipment to the job site, pulling a large boat, or running a fully loaded service truck, this tune gives you the power and responsiveness you need without sacrificing reliability. With gains of +40 RWHP and +72 ft-lbs of torque, the difference is clear when you're climbing hills, merging into traffic, or trying to keep momentum on long grades. Throttle response is more predictable, low-speed trailer control improves, and shifting under load feels smoother and more controlled. You still retain your factory turbo brake, and emissions equipment stays fully intact, making this a 50-state legal solution backed by a CARB-approved calibration. It’s a smart move for anyone who tows hard, often, and needs their truck to perform consistently under pressure. From weekend haulers to full-time operators, this tune brings out the best in your Duramax without compromising its core.

Calibrated For Serious Towing With Compliance And Control

The Heavy Tow Tune for the 2014 Silverado and Sierra 2500HD/3500HD LML is purpose-built for trucks that regularly tow up to their gross vehicle weight rating. It includes the EFI Live SPADE AutoCal V3 device and a custom tune that incorporates more than 100 calibration changes from stock. These changes optimize fueling, timing, turbo behavior, and pedal response to deliver improved power and control while keeping exhaust temperatures in check. Built-in SMART EGT Control actively manages heat during long pulls, while refined air-fuel ratios help reduce soot and maintain cleaner engine operation. This tune is fully emissions intact and 50-state legal under E.O. No. D-845, meaning it meets strict compliance standards without limiting performance. You’ll notice more consistent throttle response, improved trailer maneuvering at low speeds, and enough torque to stay in your gear longer when climbing grades. It’s ideal for commercial haulers, mountain drivers, or anyone towing heavy on a regular basis. No wire tapping, sensor splicing, or guesswork, just reliable tuning backed by the experts at DuramaxTuner.com.

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

Notes:

• Compatible with 2014 GM 2500HD/3500HD 6.6L Duramax LML
• This product includes the EFI Live SPADE (AutoCal V3) device
• 50-state legal tune under CARB E.O. No. D-845
• Emissions equipment remains fully intact with this tune
• Designed specifically for towing up to GVWR (8,000 lbs+)
• Ideal for customers who tow heavy loads regularly
• SMART EGT Control helps maintain safe exhaust temperatures
• Improves throttle response and low-speed trailer maneuvering
• EFiLive license is included with the purchase
• No wire cutting or sensor modifications required
• Recommended to pair with TCM tuning for drivetrain upgrades
• DuramaxTuner.com offers full customer support and troubleshooting