Buy 2019 Gmc Sierra 2500 HD 6.0L Vortec V8 CNG A/T 4WD SLT Extended Cab Pickup Fleetside Seal. Pipe By-pass, Cooling, DIESEL - OEM Gmc Part # 12658352

A component which prevents a leak at the Cooling System Bypass Line. Bypass Pipe to Lower Thermostat Housing. O-Ring. Included with: By-pass Pipe.

Engine Coolant Pipe O-RingEngine 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 2019 GMC Sierra 2500 HD 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 GMC part.