GMC Sierra 2500 Upper Coolant Pipe - Wehrli - Fabricated Aluminum - WCFab Grey - 2020–2025. This direct-fit hard pipe replaces the factory rubber upper radiator hose on L5P 6.6L Duramax trucks for a clean, durable upgrade.

Built from fabricated aluminum and finished in WCFab Grey, this upper coolant pipe is engineered for stock trucks and installs with basic hand tools. It uses the OEM GM radiator location for proper routing; aftermarket radiators may cause fitment issues. Kit includes high-temp silicone boots and stainless steel T-bolt clamps, and it replaces GM part numbers 84813629 and 85122989. A sturdy hard line also tidies the engine bay compared to the OEM hose.

Features

• Fabricated aluminum upper coolant pipe
• Durable WCFab Grey powder coat
• Direct replacement for GM 84813629 and 85122989
• Silicone boots and stainless T-bolt clamps included
• Fits 2020–2025 L5P 6.6L Silverado/Sierra 2500/3500
• For use with OEM GM radiator
• No modifications; installs with basic tools

Questions or need a quote? Call our Austin shop at 512-982-9393 or our Los Angeles area shop at 562-981-6800. We offer installation and customization at both locations. Buying multiple items? Contact us for shipping discounts. We install on premises at both locations.

CA Residents: WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov