49 State Legal FIVE Tune Pack Only for EFI Live Spade

Features:

• Includes five custom DuramaxTuner.com tune files
• 49-state legal and emissions equipment stays intact
• Up to +135 RWHP and +243 ft-lbs torque
• Tunes for street, towing, performance, and diagnostics
• Fully customized with 100+ calibration changes
• Retains factory turbo braking functionality
• SMART EGT Control manages exhaust temps while towing
• Smoother throttle response and revised pedal sensitivity
• Cleaner tuning with less soot than box programmers
• SPADE tuner required for installation (sold separately)
• No sensor or wiring modifications required
• Built-in support from the DuramaxTuner.com team

Unleash The Full Potential Of Your Duramax Without Compromise

If your 2015 Duramax feels like it's holding back, this 49 State Legal FIVE Tune Pack is the key to unlocking its true capability while keeping reliability and compliance intact. With five distinct tunes developed by DuramaxTuner.com, you’ll have total flexibility whether you’re towing, daily driving, or just want to feel more connected to the truck on the open road. The power gains are impressive, with the Sport tune delivering up to +135 RWHP and +243 ft-lbs of torque, enough to make your truck feel lighter and more responsive without sacrificing drivability. Need something for everyday use? The Street and Optimized Stock tunes offer smoother throttle control and improved pedal feel while maintaining excellent fuel efficiency and comfort. For towing, the Light Tow and Heavy Tow calibrations make trailer management easier, giving you better low-speed control, improved EGT management, and more usable power when it matters most. All tunes are emissions intact and designed to be safe for your engine, so you get clean, reliable performance that doesn’t cross the line. It’s the perfect upgrade for truck owners who want real power and control without cutting corners.

Five Purpose Built Tunes Backed By Proven Calibration Logic

This FIVE Tune Pack for the 2015 Silverado and Sierra 2500HD/3500HD with the 6.6L Duramax LML includes a comprehensive set of emissions-intact calibrations, each engineered for a different driving need. Every tune is built with more than 100 custom calibration changes from stock, refining everything from torque limiting and injection timing to turbo control and throttle response. The Sport and Street tunes offer the highest gains in power and torque, while maintaining factory turbo braking functionality and managing soot output with smart air-fuel ratio controls. The Light Tow and Heavy Tow options feature integrated SMART EGT Control that automatically adjusts to exhaust temperatures, providing safer operation under load without compromising power. The Optimized Stock tune allows for minimal power adjustment while still offering drivability improvements and a great fallback option for shared use or diagnostics. All tuning is applied via the EFI Live SPADE AutoCal V3, which flashes through the OBD port without requiring wiring changes or physical modifications. For trucks running larger tires, modified transmissions, or custom turbo setups, TCM tuning is highly recommended to ensure ideal shift performance and power delivery across all five tunes.

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

Notes:

• Compatible with 2015 GM 2500HD/3500HD 6.6L Duramax LML
• This is a tune-only product and does not include hardware
• Requires EFI Live SPADE (AutoCal V3) device for installation
• EFiLive license is required if using an existing SPADE device
• You must provide Serial Number and Auth Code for existing devices
• Includes five custom tunes from DuramaxTuner.com
• Tunes are emissions intact and 49-state legal
• Designed for stock or lightly modified trucks
• Not intended for use with deleted emissions systems
• No physical modifications or wiring changes are required
• Recommended to pair with TCM tuning for optimal shift performance
• DuramaxTuner.com provides full phone support for setup and tuning