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The Wehrli auxiliary coolant tank for 2020–2025 Duramax L5P mounts in the OEM location as a direct replacement for the plastic reservoir used on the fuel cooling system. Fabricated aluminum with custom powder coat, it includes a black anodized CNC billet cap and mounting hardware. Installs with basic hand tools, fits stock trucks using OEM points, and replaces GM part number 84211275 when applicable.
Wehrli 20-24 Duramax L5P Auxiliary Coolant Tank Kit - Bengal Blue
