Heavy Tow Tune incl EFI Live SPADE

Features:

• Fits 2012 6.6L Duramax LML
• 50 state legal emissions compliant
• Emissions equipment remains fully intact
• Includes EFI Live AutoCal V3
• Heavy Tow tune optimized for loads
• SMART EGT control manages temperatures
• Plus 32 RWHP and 58 lb ft
• Designed for towing 8000 lbs GVW
• Retains factory turbo brake function
• Improved low speed trailer control
• Over 100 calibration changes
• EFILive license included for one vehicle

Serious Towing Power Without Sacrificing Emissions Compliance

If your 2012 Silverado or Sierra 2500HD or 3500HD LML earns its keep by pulling heavy loads, this Heavy Tow Tune is built to make those miles easier. Instead of chasing big dyno numbers, this calibration focuses on controlled, usable torque that helps you move weight with confidence. With gains of plus 32 rear wheel horsepower and 58 lb ft of torque, your truck gets trailers rolling quicker and holds speed on grades with less throttle input. Additionally, SMART EGT control works in the background to manage exhaust gas temperatures, so you are not trading reliability for performance. The revised pedal sensitivity makes low speed maneuvering smoother, which is a big advantage when backing into tight job sites or hooking up equipment. Factory turbo brake functionality stays fully intact, giving you the control you rely on during downhill pulls. Best of all, it is 50 state legal and keeps your emissions system completely in place, so you can tow hard without second guessing compliance.

Advanced Heavy Tow Calibration With Included AutoCal V3 Hardware

This package includes the EFI Live AutoCal V3, also known as the SPADE device, giving you everything needed to flash your 2012 6.6L Duramax LML. The Heavy Tow calibration features more than 100 changes from stock, carefully adjusting torque management, fuel delivery, and throttle mapping for sustained load conditions. Built in air fuel ratio limits help reduce soot production, while SMART EGT control actively manages temperature during long pulls. Designed for towing up to 8000 pounds gross vehicle weight, this tune is ideal for work trucks, tow rigs, and service bodies that operate in demanding environments. Furthermore, the AutoCal V3 allows you to log engine data for diagnostics and performance monitoring, adding another layer of control. An EFILive license is included for one vehicle, and transmission tuning is strongly recommended to improve shift timing and torque converter lockup strategy. When properly supported, this Heavy Tow Tune delivers a balanced combination of durability, drivability, and emissions compliant performance.

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

Notes:

• Fits 2012 6.6L Duramax LML only
• 50 state legal emissions compliant
• Emissions equipment must remain installed
• Includes EFI Live AutoCal V3 device
• EFILive license valid for one vehicle
• Additional license required for other trucks
• Designed primarily for heavy towing use
• Light Tow tune may improve MPG
• TCM tuning strongly recommended
• California Prop 65 warning applies