GMC Sierra HD Upper Coolant Pipe - Wehrli - Semi-Gloss Black - 2017–2019. This aluminum upper pipe replaces the factory rubber hose on L5P Duramax trucks, delivering durable, consistent coolant routing and a tidy under-hood finish.

Built by Wehrli Custom Fabrication, this precision-formed aluminum pipe features a tough semi-gloss black powder coat for long-lasting performance. It directly replaces GM part number 84094878 and is intended for use with the OEM GM radiator on 2017–2019 GMC Sierra HD models equipped with the L5P Duramax. The kit includes high-temp silicone boots and stainless steel T-bolt clamps for secure, reliable connections. Note: aftermarket radiators may cause fitment issues.

Features

• Direct replacement for GM PN 84094878
• Fits 2017–2019 GMC Sierra HD with L5P Duramax (OEM radiator)
• Aluminum pipe with semi-gloss black powder coat
• Stainless steel T-bolt clamps and silicone boots
• Designed for OEM GM radiator; aftermarket radiators may cause fitment issues

Have questions or need guidance on your build? Call us at 512-982-9393 (TX) or 562-981-6800 (CA). We have locations in Austin, Texas and the Los Angeles, California area offering professional installation and customization services.

If you are considering multiple items, please contact us for shipping discounts. We install on premises at both locations.

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