# Fleece Performance 17-19 GM Duramax 2500/3500 Heavy Duty Transmission Cooler lines Replace your leaking transmission lines with our heavy duty, high flow, flexible transmission lines. Our kit is the most complete replacement transmission line kit available for your L5P truck! With an increased diameter over stock and heavy duty hose wrap, these lines will increase overall flow and protect against future failures. Kit Includes: (3) 5/8" ID transmission lines with AN fittings (6) 7/8"-14 O-ring to -10AN fittings (2) Large OD washers Double hose clamps, locking cable ties, and fir tree cable clamps Features: Increased diameter over stock - 5/8" hose Explosion proof polyester hose protection sleeve Application Notes: Not for use on Cab and Chassis applications - Explosion proof polyester hose protection sleeve - Increased diameter over stock - 5/8" hose This Part Fits: Year Make Model Submodel 2017-2019 Chevrolet Silverado 2500 HD High Country 2017-2019 Chevrolet Silverado 2500 HD LT 2017-2019 Chevrolet Silverado 2500 HD LTZ 2017-2019 Chevrolet Silverado 2500 HD WT 2017-2019 Chevrolet Silverado 3500 HD High Country 2017-2019 Chevrolet Silverado 3500 HD LT 2017-2019 Chevrolet Silverado 3500 HD LTZ 2017-2019 Chevrolet Silverado 3500 HD WT 2017-2019 GMC Sierra 2500 HD Base 2017-2019 GMC Sierra 2500 HD Denali 2017-2019 GMC Sierra 2500 HD SLE 2017-2019 GMC Sierra 2500 HD SLT 2017-2019 GMC Sierra 3500 HD Base 2017-2019 GMC Sierra 3500 HD Denali 2017-2019 GMC Sierra 3500 HD SLE 2017-2019 GMC Sierra 3500 HD SLT ## Details - **Price:** 478.12 CAD - **Vendor:** Fleece Performance - **Type:** Oil Line Kits ## Variants | Variant | Price | Available | |---------|-------|-----------| | Default Title | 478.12 CAD | In stock | ## Images - Photo - Primary - User 1 - User 9 - User 2 - User 1 - Logo Image --- > Source: [Standard Auto Part](https://www.standardautopart.com/products/fleece-performance-17-19-gm-duramax-2500-3500-heavy-duty-transmission-cooler-lines) > Updated: 2026-06-27