Buy OEM General Motors Part # 12643771 (12737097). Gasket. Pipe. Coolant. Engine. Hose. (Lower). 6.6 LITER DIESEL. Cooling System Bypass Line - Repair or Replace If your

A component which prevents a leak at the Cooling System Bypass Line. A component which provides a sealing surface at the Cooling System Bypass Line. Bypass Pipe to Water Pump. Gasket for Coolant System. By - Passenger seal. Bypass Seal.

Engine Coolant Pipe GasketEngine Coolant Bypass Hose GasketEngine Coolant Bypass Hose Seal

Fits Sierra 2500 HD, Sierra 3500 HD, Silverado

6.6 LITER DIESEL.
Cooling System Bypass Line - Repair or Replace
If your has been either leaking coolant or overheating, you could have a faulty cooling system bypass line. Let our technicians help trace the problem and replace the faulty coolant hose with a genuine part.