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Heavy Duty Cooling for L5P Duramax Trucks

The 2017-2019 GM 2500/3500 trucks equipped with the L5P Duramax engine are workhorses, but their factory transmission cooler lines are prone to leaks and premature wear. The Fleece Performance Heavy Duty Transmission Cooler Lines are designed to replace these weak links with a robust, high-flow solution. Engineered for maximum durability, these lines ensure your Allison transmission stays cool, even under the most demanding towing and hauling conditions.

Key Benefits for Your Duramax:

• Engineered for L5P: Direct fitment for 2017-2019 Chevrolet Silverado and GMC Sierra 2500/3500 HD.
• Leak Prevention: High-quality fittings and hoses eliminate the common failure points of factory lines.
• Improved Thermal Management: High-flow design helps maintain optimal transmission fluid temperatures.
• Easy Installation: Designed to fit perfectly into the factory routing for a hassle-free upgrade.

Whether you are a daily driver or a dedicated tower, keeping your transmission fluid cool is the secret to longevity. Don't let a leaking line compromise your truck's performance. Upgrade to the Fleece Performance standard and enjoy the confidence that comes with superior engineering. Find these premium transmission cooler lines and more for your Duramax at GGCRACING.