DuramaxTuner DT1160030101002 Switch on the Fly ECM Tune with Hardware & Credits | 2020-2023 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax L5P

Features:

• Switch-on-the-fly tuning with five power levels
• Includes custom ECM and TCM tuning
• Emissions intact—no deletes required
• Modified ECM and TCM hardware included
• Sport tune adds up to 150 RWHP
• SMART EGT control for safe towing
• HP Tuners MPVI3 hardware included
• Eight tuning credits included in package
• No reflash needed to change tunes
• Improved throttle response and drivability
• Great for towing, performance, or daily use

Highly-Capable Tuning Upgrade for 6.6L Duramax

If you’re ready to get serious about custom tuning for your 2020–2023 L5P Duramax, the DuramaxTuner Switch-On-The-Fly ECM Tune Package is one of the most complete and user-friendly solutions available. It gives you the power and flexibility to control your truck’s performance with the turn of a dial—no re-flashing, no down time, and no cutting corners. Whether you're towing a trailer, commuting to work, or just looking to let your truck breathe a little more, this package delivers exactly what you need. At the heart of the setup is Switch-On-The-Fly tuning, which lets you move between five custom power levels on demand. Each tune is emissions intact and built from the ground up to balance power, drivability, and long-term reliability. With just a turn of the switch, you can move from Optimized Stock to Heavy Tow, Light Tow, Street, or a full-blown Sport tune pushing up to 150 additional rear-wheel horsepower and 270 lb-ft of torque. No plugging in a tuner. No waiting. Just instant response that adapts to what you’re doing behind the wheel.

Complete Kit Gets You on the Road Faster

You’re not just buying tunes—you’re getting the hardware and credits needed to make it all happen. The package includes a modified ECM, ready to drop in, and HP Tuners MPVI3 hardware along with the required tuning credits. You can scan, log, adjust, and flash with industry-leading tools that give you total access to your truck’s performance. The included VCM Suite lets you fine-tune and monitor every detail of how your truck is running, whether you’re chasing numbers or just keeping an eye on temps and torque. Transmission tuning is also part of the deal, and it’s a huge bonus. The 10-speed Allison calibration is custom-tailored to work hand-in-hand with your new ECM tuning. You’ll see improved shift timing, stronger clutch engagement, and a better overall feel whether you’re towing heavy or running wide open. From daily driving to performance towing or high-output builds, this is a true all-in-one tuning solution that doesn’t cut corners. It’s designed for truck owners who want serious results without compromising emissions compliance or reliability—and it’s backed by years of DuramaxTuner experience and support. If you’re ready to get more out of your L5P, this is how you do it right.

Fits: 2020, 2021, 2022, 2023 GM 2500HD/3500HD 6.6L Duramax