Dieselr EPC Blocker Duramax LML/L5P 6.6L (2011-2019)

EPC Blocker for 6.6L LML/L5P Duramax

The Dieselr EPC Blocker Duramax LML/L5P 6.6L (2011-2019) is a precision-fit component designed for specific transmission control configurations on late-model 6.6L Duramax platforms. Engineered for proper installation within the valve body assembly, this part supports controlled hydraulic behavior in performance-oriented transmission builds.

Built specifically for LML and T87A-equipped L5P applications, it integrates cleanly without requiring modification to surrounding components.

Platform Fitment

• 2011-2016 GM 6.6L Duramax LML
• 2017-2019 GM 6.6L Duramax L5P (T87A TCM only)
• Chevrolet Silverado 2500HD / 3500HD
• GMC Sierra 2500HD / 3500HD

Important: L5P compatibility is limited to trucks equipped with the T87A transmission control module. Verify TCM type prior to ordering.

Engineering Overview

Application-Specific Design

Manufactured to match OE valve body dimensions and hydraulic passage alignment for correct installation.

Transmission Build Support

Intended for controlled transmission configurations where internal hydraulic strategy is being modified.

Precision Fitment

Designed to install without altering factory sealing surfaces when used in the correct application.

Installation Notes

• Intended for use during transmission service or rebuild
• Professional installation strongly recommended
• Calibration adjustments may be required depending on overall transmission strategy

Installer is responsible for confirming TCM compatibility and overall build configuration.

Support

Dieselr supports platform-correct transmission strategies validated under load. Confirm your control module type and overall configuration before proceeding.

Built to work the way it should.