Keep hot coolant moving to the heater core with the Dayco Molded Heater Hose 88425, a pre-formed replacement hose for the 2001-2005 Chevrolet Venture, 2001-2004 Oldsmobile Silhouette, 2001-2005 Pontiac Aztek, 2001-2005 Pontiac Montana, and 2002-2005 Buick Rendezvous, all with the V6-3.4L engine. This heater hose carries engine coolant between the engine and the heater core; a cracked, swollen, or leaking original is a common reason for coolant seepage, a sweet smell, or weak cabin heat.
- Molded construction: pre-shaped to route through the factory path rather than a straight length of bulk hose.
- Dual hose: the two ends carry different inside diameters — End 1 at .63 in and End 2 at .72 in.
- Centerline length: 13 in overall.
- Country of origin: Mexico.
Because it is molded, it drops into the listed application without cutting or bending a universal hose to shape. Inspect the clamps and connection points during installation, and confirm the correct coolant fill and bleed procedure in the vehicle service information.
Interchange: Manufacturer part number 88425.
This part cross-references / interchanges with the following part numbers:
Frequently Asked Questions
What does this heater hose do?
It carries engine coolant between the engine and the heater core, which supplies the heat used for cabin warmth and defrost.
Which vehicles does the 88425 fit?
It fits the 2001-2005 Chevrolet Venture, 2001-2004 Oldsmobile Silhouette, 2001-2005 Pontiac Aztek and Montana, and 2002-2005 Buick Rendezvous, all with the V6-3.4L engine.
Why are the two ends different sizes?
This is a dual hose: End 1 has a .63 in inside diameter and End 2 has a .72 in inside diameter, so each end matches its connection.
How long is the hose?
The centerline length is 13 in, and it is molded to a pre-formed shape rather than supplied as straight bulk hose.
What are signs this hose may need replacing?
Coolant seepage, a sweet coolant smell, a swollen or cracked hose, or weak cabin heat can indicate a failing heater hose. Diagnose the cause before replacing.
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