GM Genuine Parts Engine Coolant Thermostat Housing Gasket 12643149 | 2017-2026 Duramax 6.6L L5P

Ensure a proper seal between the thermostat housing and engine with this GM Genuine Thermostat Housing Gasket. Designed to prevent coolant leaks and maintain cooling system integrity, this gasket delivers the fit and reliability of original equipment.

• Genuine GM OE component
• Seals the thermostat housing to the engine to prevent leaks
• Engineered and tested to strict GM standards
• Durable construction for long service life
• Designed specifically for GM vehicle applications

Note: Some GM Genuine Parts may have previously been labeled as ACDelco GM Original Equipment (OE).