2017–2023 Chevy GMC L5P Duramax | Ez Lynk Tuner | EGR DPF DEF Delete Tuning | 4-Week or Lifetime

2017–2023 Chevy / GMC L5P Duramax

Dyno Diesels Tuning Support Package + Ez Lynk Tuner. 

4-Week Support Included | Lifetime Support Optional
L5P Only – Not Compatible with L5D

Includes Ez Lynk Auto Agent 3.

This product includes Dyno Diesels tuning support for 2017–2023 Chevy / GMC L5P Duramax platforms. It is designed to deliver stable, VIN-matched calibration support, reliable flashing, and ongoing refinement through a modern, cloud-based tuning interface.

A 4-week tuning support package is included with purchase. Customers may upgrade to Lifetime Support for long-term access and continued updates.

4-Week Support Package (Included)

The included 4-week Dyno Diesels Support Package provides access to:

• Initial tuning delivery
• Tune flashing support
• Basic revisions during the support window

This option is ideal for customers who want to flash once and drive with minimal follow-up.

Lifetime Support Package (Optional Upgrade – Recommended)

The Dyno Diesels Lifetime Support Package is designed for customers who want long-term flexibility and continued refinement as tuning strategies improve.

Lifetime Support Benefits:

• Unlimited tune flashes
• Ongoing basic tune revisions
• Automatic access to future tuning updates
• Long-term value for evolving builds

This upgrade is strongly recommended for customers who plan to keep their truck or modify it over time.

TCM (Transmission Control Module) Tuning

Highly Recommended Upgrade

As engine output increases, proper transmission calibration becomes critical. Dyno Diesels TCM tuning increases line pressure and refines shift behavior so the transmission can safely handle added torque.

TCM Tuning Benefits:

• Increased line pressure for clutch holding capacity
• Firmer, more consistent shifts
• Reduced slip under load
• Improved transmission durability

TCM tuning is strongly recommended for any setup running more than a basic tow or stock-power tune.
Please specify any transmission modifications when ordering so calibration can be matched correctly.

Available Power Levels

Selectable power levels include:

• Stock
• 30 HP
• 60 HP
• 90 HP
• 120 HP
• 150 HP
• SOTF (Switch on the fly video HERE) 
• TCM (Transmission tune) 

Actual output depends on vehicle condition, supporting modifications, and configuration.

IMPORTANT PLATFORM NOTICE

⚠️ Certain 2017–2018 trucks require a bench unlock

• Vehicles with ECM part numbers ending in 12676723 must be removed and sent in for a bench unlock before tuning can be applied
• These units are not currently flashable through standard vehicle-side methods
• Firmware updates are released regularly, and unlocking capability continues to improve

If flashing issues occur, Dyno Diesels will assist you through the proper support channels.

Platform Compatibility

• 2017–2023 Chevy / GMC Duramax L5P
• ❌ Not compatible with L5D engines

Dyno Diesels Philosophy

Dyno Diesels tuning support is built around controlled calibration access, measured refinement, and long-term reliability. Whether you choose short-term or lifetime support, the goal is the same—clean drivability, predictable power, and dependable results.

Dyno Diesels — Engineered support. Validated tuning. Built to last.