Fleece Performance 01-13 GM Duramax 6.6L AlliLocker - Allison Torque Converter Controller

The AlliLocker uses a solid-state electronic control module to manage your Allison transmission's torque converter clutch. This means you get more direct control over when the torque converter locks up, which is especially useful when you're towing or hauling heavy loads. It's designed to work with a wide range of GM trucks, including models like the Chevrolet Silverado 2500 HD and GMC Sierra 3500 HD from 2001 through 2016.

This controller is built with a well-made electronic module that replaces the factory lock-up solenoid wiring. It allows you to manually engage or disengage the torque converter lock-up via a dash-mounted switch, giving you the flexibility to choose the best mode for your driving conditions. For example, you can keep it unlocked at low speeds to reduce heat buildup during towing, or lock it up on the highway for improved fuel efficiency. Installation involves wiring the module into your truck's existing harness, and it's designed to be a direct replacement for the factory solenoid wiring harness.

Keep in mind that this controller is not CARB approved and cannot be shipped to California. It's a popular choice for Duramax owners looking for more command over their Allison transmission's performance, especially when dealing with demanding tasks like towing.