GMC Sierra 2500HD Thermostat Housing Kit - Wehrli - Billet - Deore Gold - 08–10. Reroutes coolant forward from the thermostat with a precision billet housing and upper pipe for a service-friendly layout on 2008–2010 LMM Duramax trucks.

Moves the upper hose off the driver-side valve cover and revises the return path to improve fuel-system access and make room for larger turbo hardware. Works with factory VGT; required with race-cover or SXE valley turbos. Includes coolant pipe, silicone boots, and T-bolt clamps in Deore Gold. Versions for single CP3 or twin/dual‑alternator.

Features

• CNC-machined billet upper thermostat housing
• Forward/top routing for improved driver-side access
• Room for larger turbos; compatible with factory VGT
• Includes coolant pipe, silicone boots, and T-bolt clamps
• 2008–2010 GMC Sierra 2500HD LMM; single CP3 WCF100420 or twin/dual-alt WCF100424; replaces GM 19330105, 15792824, 25833204, 97361881; not for 2006–2007

Questions? We offer installation and customization in Austin, TX and Los Angeles, CA. Call 512-982-9393 (TX) or 562-981-6800 (CA).

Ordering 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