HP Tuners Expands E42 ECM Support to L5D Medium-Duty Applications
Published on: February 18, 2026Categories: New Vehicle Support, Press Releases
BUFFALO GROVE, IL, February 18, 2025—HP Tuners is expanding its E42 ECM support with the addition of L5D-equipped medium-duty platforms, bringing tuning and diagnostics capabilities to a new class of commercial and fleet-focused vehicles.
This update extends HP Tuners’ proven E42 workflow beyond L5P applications and now includes select 2024+ GM and International medium-duty trucks powered by the L5D engine. With this release, tuners can use the same familiar tools and upgrade process to access tuning, diagnostics, and data logging on supported L5D E42 platforms.
Key Details
- Controller: E42 ECM
- Engine: L5D
- Supported Vehicles: Select 2024+ GM and International medium-duty trucks
- Upgrade Required: GM E42 ECM Service
- Credits Required: 8 Universal Credits
- Devices Supported: MPVI3 and newer
- Remote Tuning: Supported via RTD4
By expanding E42 support to L5D platforms, HP Tuners continues to broaden its coverage across modern GM controllers while maintaining a consistent, reliable workflow for professionals working in both performance and commercial segments.
For more information, visit www.hptuners.com.
ABOUT HP TUNERS—HP Tuners is the leading diagnostic and calibration solution for vehicle aftermarket performance with over 20 years of expertise. From diagnostics, data logging, scanning, custom calibration, and more, HP Tuners offers the most comprehensive solution for OBDII-equipped import, domestic, and powersports vehicles. Connect with HP Tuners at www.hptuners.com.