Fleece Performance 17-19 GM Duramax 2500/3500 Heavy Duty Transmission Cooler lines

The Fleece Performance 17-19 GM Duramax 2500/3500 Heavy Duty Transmission Cooler Lines are high-performance replacement components designed for Duramax L5P trucks. These flexible, high-flow transmission lines feature an increased diameter of 5/8" over stock and are wrapped with heavy-duty hose protection, enhancing flow capacity and durability. The kit includes three 5/8" ID transmission lines with AN fittings, six 7/8"-14 O-ring to -10AN fittings, large OD washers, double hose clamps, locking cable ties, and fir tree cable clamps. Built with explosion-proof polyester hose protection, these lines are engineered to prevent future failures and improve transmission cooling efficiency, making them a reliable upgrade for demanding applications.

Designed for 2017–2019 GM Duramax 2500 and 3500 models, these heavy-duty transmission cooler lines are a direct replacement for OEM components on L5P trucks. Not suitable for cab and chassis applications, they are ideal for heavy-duty use, including towing and off-road driving, where enhanced flow and durability are critical. The kit provides all necessary fittings and clamps for a straightforward installation, ensuring a secure, leak-free connection. These lines are intended for use in performance and durability-focused scenarios, offering increased flow and protection against leaks and failures in demanding environments.