Collection: GM Duramax Tuning Devices

DIESELR offers industry-leading tuning devices for 2001-2024 Duramax trucks, built to maximize power, efficiency, and drivability. Whether you need custom tuning, shift-on-the-fly adjustments, or full ECM/TCM control, these devices deliver real performance, real results for your LB7, LLY, LBZ, LMM, LML, L5P, LM2 and LWN Duramax engines.

✔ Compatible with 6.6L and 3.0L Duramax models
✔ Instant tuning adjustments for towing, fuel efficiency, and power
✔ Backed by DIESELR’s expert tuning support

EZ Lynk AutoAgent 3

The most user-friendly and powerful wireless tuning platform for Duramax.

• Cloud-based tuning with instant tune file updates
• Full ECM/TCM control for power, transmission, and efficiency gains
• Compatible with 2011-2024 LML & L5P Duramax

GDP Commander

Advanced tuning device for Duramax owners who demand full control.

• ECM and TCM tuning support for 2017+ L5P Duramax
• No need to send in your ECM—flash directly in-truck
• Supports SOTF tuning for instant power adjustments

HP Tuners MPVI3

The most advanced tuning platform for serious Duramax enthusiasts.

• Custom tuning with full ECM calibration control
• Works with LB7, LLY, LBZ, LMM, LML, L5P, LM2 Duramax
• Supports real-time data logging and diagnostics