Heavy Tow Tune Only for EFI Live Spade

Features:

• Designed for heavy towing applications
• Increases power without raising EGTs
• +40 RWHP and +72 ft-lbs torque
• Safe for towing up to 8,000 lbs GVW
• Custom SMART EGT Control included
• Improved low-speed trailer maneuvering
• Factory turbo brake stays fully functional
• Smoother throttle response and pedal control
• DuramaxTuner custom tuning with 100+ changes
• 50 State Legal emissions-intact tuning
• Compatible with EFI Live SPADE Autocal V3
• Better power delivery than box programmers

Built For Drivers Who Make Their Truck Earn Its Keep

If your 2012 Duramax spends its life with a trailer hooked up, this Heavy Tow Tune is designed to make every mile easier and more controlled. It adds usable torque right where you need it, helping your truck pull away from stops with confidence and maintain speed on long grades. The added power does not come at the cost of reliability, which is especially important when you tow for work or long distances. Throttle response feels more predictable, and the truck is less likely to hunt for gears when climbing hills. Backing trailers into tight spots becomes smoother thanks to refined pedal sensitivity and better low-speed control. You still keep your factory turbo brake, emissions equipment stays intact, and the tune remains 50 state legal. For anyone hauling equipment, boats, or heavy service loads, this tune simply makes the truck feel like it is working smarter instead of harder.

Purpose Driven Calibration For Serious Towing Demands

This Heavy Tow Tune is engineered specifically for the 2012 GM Silverado and Sierra 2500HD and 3500HD equipped with the 6.6L Duramax LML. It delivers gains of up to +40 RWHP and +72 ft-lbs of torque while focusing on thermal management and drivetrain safety. Custom SMART EGT Control is built into the calibration to automatically manage exhaust temperatures during sustained towing. Air fuel ratio limits are carefully set to reduce soot output compared to box style programmers, helping protect emissions components over time. More than 100 calibration changes from stock refine fueling, timing, and throttle mapping for consistent power delivery under load. The tune retains full factory turbo braking functionality and is designed to tow up to 8,000 lbs GVW with confidence. Installation requires the EFI Live SPADE AutoCal V3 and is completed through the OBD port with no wiring or sensor modifications required.

Fitment: 2012 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LML

Notes:

• This tune is 50 State Legal and keeps all emissions equipment intact.
• Designed specifically for towing loads up to 8,000 lbs GVW.
• Provides +40 RWHP and +72 ft-lbs torque increase over stock.
• Includes SMART EGT Control to automatically manage exhaust temps.
• Helps prevent excessive soot buildup with air-fuel ratio limits.
• Retains factory turbo-braking function for safe downhill towing.
• Improves low-speed trailer maneuvering and pedal sensitivity.
• SPADE / EFI Live AutoCal v3 device is required for use.
• Custom tuning includes over 100 calibration changes from stock.
• Transmission tuning is strongly recommended for best results.
• Works especially well for commercial users and frequent towers.
• Users with performance modifications may need the 49 State version.