Optimized Stock Tune incl EFI Live SPADE

Features:

• Fits 2014 6.6L Duramax LML
• 49 state legal emissions compliant
• Emissions equipment remains fully intact
• Slight revisions to factory calibration
• No significant peak power increase
• Lower smoke output than stock
• Ideal for troubleshooting drivability issues
• Supports custom tire size adjustments
• Maintains factory towing capability
• Includes EFI Live AutoCal V3
• EFILive license included for one vehicle
• Works seamlessly with transmission tuning

A Clean Factory Like Drive With Smarter Calibration Control

If you want your 2014 Silverado or Sierra 2500HD or 3500HD LML to feel refined without chasing big horsepower numbers, this Optimized Stock Tune is the right move. It keeps your emissions equipment fully intact and remains 49 state legal, so you get peace of mind along with improved drivability. The calibration makes subtle revisions to the factory file, helping reduce smoke output and smooth out overall operation. Additionally, it is a great solution if you have installed a mild upgrade such as an intake and need proper tuning support without adding more power. Many owners use this file when someone else is driving the truck or when they simply want predictable, factory like behavior. You can still tow with confidence, just without the added torque gains of the dedicated tow tunes. It is a smart option for drivers who value reliability, compliance, and a clean running truck.

Refined ECM Calibration With Included AutoCal V3 Hardware

This package is engineered specifically for the 2014 6.6L Duramax LML and includes the EFI Live AutoCal V3 device for straightforward flashing and data logging. The Optimized Stock calibration features slight adjustments to fuel delivery, torque management, and throttle mapping while keeping peak power levels close to factory output. Furthermore, it supports custom tire size settings, which can help correct speedometer readings and TPMS related concerns after wheel and tire changes. Because it maintains emissions compliance and avoids aggressive power increases, it is often used for troubleshooting mechanical issues or as part of a multi tune setup. The included EFILive license covers one vehicle, and transmission tuning is recommended for improved shift quality and overall drivability. By pairing factory like performance with thoughtful calibration updates, this tune delivers a balanced solution for owners who want precision without added stress on components.

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

Notes:

• Fits 2014 6.6L Duramax LML only
• 49 state legal with emissions intact
• Emissions equipment must remain installed
• Includes EFI Live AutoCal V3 device
• EFILive license valid for one vehicle
• No significant peak power increase
• Does not include Light or Heavy Tow gains
• Ideal for stock or lightly modified trucks
• Transmission tuning recommended for best drivability
• California Prop 65 warning applies