Street Tune Only for EFI Live Spade

Features:

• Gain up to +110 HP and +198 torque
• Emissions intact and 50-state legal tune
• Delivers smooth and responsive throttle control
• No dead pedal or delay off the line
• Improved acceleration with lighter truck feel
• Custom tuning with 100+ ECM calibration changes
• Retains full factory turbo-braking functionality
• Requires EFI Live AutoCal V3 hardware
• No cutting or wiring into factory systems
• More power and less soot than box tuners
• Optimized for stock or lightly modified trucks
• Supported by world-class customer service team

The Upgrade That Makes Every Drive More Enjoyable

If your 2015 Silverado or Sierra HD feels capable but uninspiring, this Street Tune is the upgrade that changes everything. The added horsepower and torque are immediately noticeable, giving the truck a stronger pull and a lighter feel when you step into the throttle. Throttle response is clean and predictable, eliminating that dead pedal sensation that makes stock trucks feel sluggish. Around town or on the highway, the power comes in smoothly, making the truck more fun to drive without feeling out of control. You still keep factory features like turbo braking and your full emissions system, so this performance gain fits seamlessly into daily use. For drivers who want more excitement without sacrificing reliability, this tune strikes the perfect balance. It turns routine drives into something you actually look forward to.

Refined Street Tuning Built On Proven EFI Live Control

This Street Tune for the 2015 6.6L Duramax LML is a fully custom ECM calibration with more than 100 changes from the factory tune. Using EFI Live AutoCal V3 hardware, the tune is flashed through the OBD port without cutting wires or modifying sensitive sensors. The calibration focuses on improving throttle mapping, torque management, and fueling to deliver strong gains while maintaining OEM reliability. Emissions equipment remains fully intact, and the tune carries a 50-state legal Executive Order for compliant use. Compared to box programmers, this approach produces cleaner power with less soot and better consistency across the RPM range. Factory turbo braking functionality is retained to ensure confident control on grades and downhill driving. For the best overall results, especially on trucks with larger tires or added weight, pairing this tune with recommended TCM tuning helps keep the engine operating in its ideal range.

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

Notes:

• This is a single Street Tune, not Switch on the Fly
• 50-state legal with E.O. Number D-845
• Emissions equipment must remain installed and functional
• Not recommended for heavy or frequent towing use
• If towing regularly, consider Switch on the Fly tuning instead
• SPADE / EFI Live AutoCal V3 is required
• EFILive license is included if you purchase hardware from us
• Using existing hardware requires an additional license
• We will need Serial Number and Auth Code for reused devices
• Custom tunes are non-refundable once delivered
• Recommended TCM tuning for trucks with larger tires or mods
• Not designed for deleted or off-road-only applications