EVRBUL Heater Core Hose Connectors 2PC 3/4" Tube to 5/8" Hose — Stainless Steel with EPDM Seal & Clamps Included

High-strength EVRBUL heater core hose connectors deliver a sealed, corrosion-resistant inlet/outlet repair for 3/4" tube to 5/8" coolant hose connections. These two-piece connectors replace worn or leaking heater core fittings with a durable 304 stainless steel assembly and an EPDM internal seal ring. The kit includes two connectors, stainless clamps, a small tube of grease, and two removal tools sized for 5/8" and 3/4" fittings so you can install or remove the fittings without cutting hoses. Designed for many Chevrolet, GMC, Cadillac and related models, this set restores a secure coolant path and reduces the need for repeated repairs.

How do these connectors stop leaks at the heater core?

Each connector uses a corrosion-resistant EPDM rubber sealing ring inside the stainless body to form a tight interface with the hose. A sprung locking clip secures the connector to the heater core tube, preventing axial movement and reducing the chance of coolant seepage under vibration.

• EPDM inner seal resists coolant and heat for reliable compression.
• 304 stainless steel body prevents rust and maintains shape.
• Spring clip locks to the heater core tube to stop pull-off leaks.
• Included hose clamps add an extra mechanical seal on the hose end.

What is included and how does it simplify installation?

The package contains two complete connector assemblies plus the small tools and accessories needed to fit them without special shop equipment. Included dismantling tools match the connector sizes so you can disengage the spring clip cleanly; clamps and grease make positioning and sealing straightforward.

• 2 × stainless steel connectors with EPDM seals for both heater lines.
• 2 × disassembly tools (one for 5/8" hose, one for 3/4" tube) for removal/installation.
• 2 × stainless steel hose clamps for added hose retention.
• 1 × grease packet to ease assembly and preserve the seal ring.

Which vehicles and hose sizes are compatible with this kit?

These fittings are made for a 3/4" heater tube connection to a 5/8" coolant hose and suit many GM platform vehicles that used similar heater core connections. They fit common model years of Silverado, Sierra, Tahoe, Suburban, Yukon, Avalanche and other related Chevrolet, GMC, Cadillac, Lincoln and Pontiac vehicles, but you should confirm dimensions before ordering.

• Tube side: 3/4" (heater core/stub tube).
• Hose side: 5/8" coolant hose.
• OE replacement cross numbers covered: 800-409, 15032062 and related OEM references.
• Fits many 1999–2014 GM models—verify your vehicle’s heater line sizes first.

How durable are these connectors under heat and vibration?

The body is formed from 304 stainless steel for superior corrosion resistance compared with plated or cheap alloys. The EPDM seal tolerates coolant and elevated under-hood temperatures while the spring clip and clamps resist loosening from engine vibration, giving a long service life when installed correctly.

• 304 stainless resists rust in road-salt and humid conditions.
• EPDM seal maintains flexibility across temperature cycles.
• Mechanical spring clip prevents axial movement under vibration.
• Stainless clamps ensure secure hose retention over time.

Who is this for? This kit is ideal for DIY mechanics, fleet maintenance staff, and professional technicians needing a robust heater core connection repair for GM-platform vehicles that use a 3/4" tube to 5/8" hose interface. If you want a corrosion-resistant replacement that includes installation tools and clamps, the EVRBUL two-piece connector set offers a ready-to-fit solution that reduces downtime and recurring leaks. Always confirm tube and hose diameters on your vehicle before purchase to ensure a correct fit.

FAQ

Q: Will these connectors fit my vehicle?

A: They fit 3/4" heater tube to 5/8" hose setups on many Chevrolet, GMC, Cadillac models; confirm your vehicle’s tube and hose diameters before buying.

Q: Do I need special tools to install them?

A: No; the kit includes two disassembly tools sized for 5/8" and 3/4" fittings plus clamps and grease for installation.