Keep hot coolant moving to the heater core with the Dayco Molded Heater Hose 87959. This pre-formed, branched heater hose is a direct-fit replacement across a wide range of GM full-size trucks and SUVs, including the 2007-2013 Chevrolet Avalanche [V8-5.3L], 1999-2004 Chevrolet Silverado 2500 [V8-6.0L], 2009 GMC Sierra 1500 [V8-6.2L], and many more — see the Buyer's Guide tab for the full list of 26 applications.
As a molded hose, it is pre-formed to a set shape and carries engine coolant between the cooling system and the heater core so the cabin heating and defrost system has the coolant flow it needs.
- Molded construction: pre-formed to hold a specific routing shape rather than a straight length of hose.
- Branched type: includes a branch rather than a single straight run.
- Dual inside diameters: End 1 measures 0.75 in ID and End 2 measures 1 in ID.
- Sizing: 15.5 in centerline length and 34 in along length axis 1.
Signs this hose may need replacing include coolant leaks, cracked or swollen rubber, or a soft, collapsing section. Manufacturer part number 87959. Country of origin: Mexico.
This part cross-references / interchanges with the following part numbers:
Frequently Asked Questions
What is the Dayco 87959?
It is a molded, branched HVAC heater hose that carries engine coolant between the cooling system and the heater core for cabin heating and defrost.
Which vehicles does this heater hose fit?
It is a direct-fit replacement for 26 listed GM applications, including Chevrolet Avalanche [V8-5.3L], Silverado 1500/2500/3500 and GMC Sierra models. Check the Buyer's Guide tab for the full list.
What are the inside diameters of this hose?
End 1 has a 0.75 in inside diameter and End 2 has a 1 in inside diameter. It measures 15.5 in centerline length and 34 in along length axis 1.
Where is this hose made?
The country of origin is Mexico.
How do I know if my heater hose needs replacing?
Signs it may need replacing include coolant leaks, cracked or swollen rubber, or a soft, collapsing section. Diagnose the source of any leak before replacing.
Write a Review