Yoursme Stainless Steel Coolant Connector 3/4" Tube × 5/8" Hose — 2-Pack, OEM Replacement for GM & Ford HVAC Lines

The Yoursme 800-409HP coolant connector is a stainless-steel heater/coolant line adapter (3/4" tube × 5/8" hose) sold in a 2-pack to directly replace common OEM fittings on many GM and Ford trucks and SUVs.

This connector is built to replace brittle plastic originals and restore a tight, leak-resistant joint in HVAC and engine coolant circuits. Manufactured from corrosion-resistant stainless steel and supplied with seals and clamps, the assembly is intended to fit a wide range of Chevrolet, GMC, Ford, Cadillac, Buick, Oldsmobile, Pontiac, Lincoln and Hummer applications spanning many model years—confirm fitment against your vehicle before ordering.

Which vehicles will this coolant connector fit?

This part covers numerous GM and Ford models across several decades, including popular trucks and SUVs where the OE plastic fittings commonly fail. Compatibility lists include Silverado, Sierra, Tahoe, Suburban, Yukon, Escalade, Avalanche, many Savana/Express and multiple Ford F-series, Expedition and E-series vans. Always check the item photos or your OEM part number against the replacements listed to confirm fitment.

• Direct replacements for OEM numbers such as 15792820, 15151875 and 800409.
• Covers model ranges like Silverado/Sierra (1999–2014), Tahoe/Suburban (2000–2014), Yukon/Escalade families and many Ford F and E series.
• Also fits select Pontiac, Oldsmobile, Buick, Lincoln and Hummer models indicated in the fitment details.

How does the stainless-steel design improve reliability?

Stainless steel resists cracking, warping and corrosion that commonly affect plastic connectors exposed to heat cycles and coolant chemicals. The metal construction offers increased mechanical strength and longevity, reducing the chance of sudden coolant loss or heater-core leaks associated with aged OEM plastic hoses.

• High-grade stainless resists rust and coolant degradation.
• Stronger against impacts and vibration versus plastic originals.
• Maintains shape under repeated thermal expansion and contraction.

What comes in the box and how easy is installation?

The kit includes two complete connector assemblies with replacement O-rings and stainless clamps. The design is intended for a straightforward swap—no specialty tools required—so a typical DIYer with basic hand tools can complete the job quickly and get the cooling and heating circuits sealed again.

• Contents: 2x coolant connectors, 2x seals (O-rings), 2x stainless-steel clamps.
• Size: 3/4" tube × 5/8" hose—verify measurements match your vehicle lines.
• Installation: remove the old fitting, position new O-ring, insert connector, and tighten clamps to secure.

Will this stop leaks and is it compatible with OEM systems?

When installed correctly with the provided seals and clamps, the connector is intended to form a tight, leak-minimizing joint suitable for integrated heater and coolant lines. It is manufactured to match the dimensions of common OEM parts, enabling direct replacement of many part numbers, but always double-check compatibility for your specific engine and trim.

• Designed to replace OEM part numbers like 15792820 and 15151875.
• Includes new O-rings to help ensure a proper seal during installation.
• Intended for HVAC and coolant circuit connections where the hose-to-tube transition is required.

Who is this for: This kit is aimed at mechanics, restoration enthusiasts and vehicle owners who need a durable replacement for failing plastic heater/coolant fittings on mid- to full-size GM and Ford trucks and SUVs. It suits anyone seeking a corrosion-resistant, longer-lasting connector with the convenience of a two-pack and the included seals and clamps for a complete repair.