Street Tune Only for EFI Live Spade

Features:

• Gain up to +110 HP and +198 torque
• Emissions intact and 49-state legal
• No dead pedal or throttle delay
• Faster acceleration with smoother power delivery
• Retains factory turbo-braking functionality
• Ideal for spirited daily driving
• Fully custom tuning with 100+ ECM changes
• No wiring modifications or sensor tapping needed
• Cleaner power with reduced soot output
• Requires EFI Live AutoCal V3 device
• Flash updates and data log from home
• World-class support from real tuning experts

Turn Your Daily Driver Into A Whole New Truck

If your 2015 Duramax still feels stuck in factory mode, this Street Tune will wake it up in a big way. With up to +110 rear-wheel horsepower and +198 ft-lbs of torque, this tune gives your truck the kind of throttle response and pull that makes it genuinely fun to drive. It’s not just about raw power, either. The power curve is smooth and predictable, throttle sensitivity is dialed in, and the truck feels lighter and quicker whether you’re cruising through traffic or rolling onto the freeway. You’ll still keep full use of your factory turbo brake, and the emissions system stays untouched, making this a clean, legal upgrade for 49 states. For guys who’ve owned a tuned diesel before, this brings that performance feel back without compromising daily drivability. Whether you drive your truck every day or just enjoy taking it out on the weekends, this tune transforms how it behaves under your foot.

Built With Real Calibration Not Just More Fuel

This Street Tune isn’t just a generic power bump, it’s a refined ECM calibration with over 100 adjustments from stock, built specifically for the 2015 LML Duramax. Delivered through EFI Live’s AutoCal V3, this setup lets you flash your truck from home, data log, and even troubleshoot, all without cutting wires or tapping into sensors. It’s built to be emissions intact and legal in 49 states, making it ideal for customers who need performance without compromise. Key elements like throttle response, torque management, and fueling are precisely tuned to deliver clean power with noticeably less soot than off-the-shelf box programmers. The result is more consistent performance, better driveability, and reliable power you can count on every time you get behind the wheel. You also retain factory safety functions, including the turbo-braking feature, so you’re not giving up control for the sake of extra horsepower. For best results, especially on trucks with larger tires or mild mods, pairing with recommended TCM tuning can make the entire setup feel even more dialed-in.

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

Notes:

• This is a single Street Tune, not Switch on the Fly
• Emissions equipment must remain installed and functional
• This tune is 49-state legal, not CARB approved
• Not recommended for towing heavy or frequent loads
• Excessive abuse or high temps may cause damage
• SPADE / EFI Live AutoCal V3 device is required
• EFILive license included if you purchase hardware from us
• If reusing hardware, a new license must be purchased
• We will need your Serial Number and Auth Code for re-used devices
• Custom tunes are non-refundable once delivered
• Recommended TCM tuning for trucks with larger tires or mods
• Not intended for deleted or off-road-only trucks