GMC Duramax Upper Coolant Pipe - Wehrli - Flat Black - `17-`19
GMC Duramax Upper Coolant Pipe - Wehrli - Flat Black - `17-`19

Available Options
Drive now, Pay later with Affirm
or with PayPal
Both options will be available upon checkout.
GMC Duramax Upper Coolant Pipe - Wehrli - Flat Black - 2017–2019. This aluminum pipe replaces the OEM rubber upper coolant hose on L5P Duramax trucks for a clean, durable under-hood upgrade.
Built by Wehrli Custom Fabrication, this upper coolant pipe features corrosion-resistant aluminum with a flat black powder coat. High-temp silicone boots and stainless steel T-bolt clamps provide secure, serviceable connections. Designed for the OEM GM radiator and a direct replacement for GM part number 84094878. Note: aftermarket radiators may cause fitment issues.
Features
- Application: 2017–2019 GM Duramax L5P (upper coolant hose location)
- Aluminum pipe with flat black powder coat
- Includes silicone boots and stainless steel T-bolt clamps
- Direct replacement for GM PN 84094878
- For use with OEM GM radiator only
Have questions or planning a build? Call our Texas shop at 512-982-9393 or our California shop at 562-981-6800. We offer installation and customization at our Austin, TX and Los Angeles, CA area locations.
If you’re purchasing 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


