Keep hot coolant flowing to your cab heater with this Dorman heater hose assembly, part number 626-557, an inlet-position hose made to replace a cracked or leaking original. It fits many vehicles, among them the 1999-2006 Chevrolet Silverado 1500, 1999-2006 Chevrolet Silverado 2500 and 1999-2006 GMC Sierra 1500. See the "Vehicles it fits" section for the full list and engine details.
This HVAC heater hose assembly is engineered to match the fit and durability of the stock assembly, and it is designed to handle extreme temperature changes.
- Ideal replacement: directly replaces the original heater hose on the listed applications, in the inlet position.
- Durable construction: designed to withstand extreme temperature changes and to resist cracking and leaking.
- Cost-effective and reliable: offers original manufacturer quality at a lower cost than a dealer replacement.
- Industry-leading design: professionally engineered by Dorman, the aftermarket leader in heater hose assemblies.
A heater hose carries engine coolant between the engine and the heater core, which supplies warmth for the cabin heater and defroster. Signs this part may need replacing include coolant drips near the firewall, a sweet coolant smell in the cab, visible cracks or swelling on the hose, a coolant level that keeps dropping, or weak cabin heat. If the original inlet hose is the source of the leak, a Dorman heater hose like this one replaces it.
Interchange: 15763368 · 62939 · SK626557
Product information is for general reference and may contain errors. See our Disclaimer.
This part cross-references / interchanges with the following part numbers:
15763368, 62939, SK626557
Frequently Asked Questions
What does this heater hose assembly do?
It carries engine coolant between the engine and the heater core from the inlet position. That hot coolant supplies the warmth for your cabin heater and defroster.
Will it fit my 1999-2006 Chevrolet Silverado 1500?
The 1999-2006 Chevrolet Silverado 1500 is a listed application, as are the 1999-2006 Chevrolet Silverado 2500 and 1999-2006 GMC Sierra 1500. Check the "Vehicles it fits" section to confirm your exact vehicle and engine.
What are signs the heater hose may need replacing?
Common signs include coolant drips near the firewall, a sweet smell in the cab, cracks or swelling on the hose, a dropping coolant level, or weak cabin heat. Diagnose the cause before replacing parts.
How is the hose installed?
It installs as a direct replacement for the original heater hose on the listed applications. Capture the coolant first, then refill and bleed the cooling system as directed by the vehicle service information.
Is it built to handle engine heat?
Dorman designed this hose assembly to withstand extreme temperature changes and to resist cracking and leaking.
