Wehrli 20-24 Duramax L5P Auxiliary Coolant Tank Kit - Deore Gold

When you're working on your 2020-2025 Duramax L5P truck, especially if you're looking to clean up the engine bay, replacing the factory plastic auxiliary coolant reservoir for the fuel cooler is a smart move. This kit from Wehrli Custom Fabrication offers a well-built aluminum alternative that looks much better than the stock component.

This auxiliary coolant tank is fabricated from aluminum and finished in a custom Deore Gold powder coat, giving your engine bay a more polished appearance. It includes a black anodized billet aluminum cap and all the necessary mounting hardware, utilizing the factory mounting points for a straightforward installation. The kit also comes with an overflow flow fitting and a preformed hose, making it a complete replacement for the OEM plastic tank (GM part number 84211275). It's designed to be a direct fit on stock trucks, meaning no other modifications are needed to install it.