HIHIAV Heater Inlet & Lower Radiator Outlet Hose Assembly — 2000–2014 GM V8 Fit, Direct-Replace Boxed Kit

HIHIAV's heater inlet and lower radiator outlet hose assembly replaces worn heater-core supply plumbing to restore coolant flow and reduce leaks on compatible GM V8 trucks and SUVs.

This direct-replacement hose assembly fits a wide range of Chevrolet, GMC, Cadillac and Hummer models from roughly 2000–2014 and is supplied as a boxed kit to protect included gaskets and connectors during shipping. The part replaces OEM numbers 15834773 and 22884219 and is designed to match factory routing, connection points and coolant passages so installation is straightforward for experienced DIYers and shops.

Which vehicles and engines does this hose assembly fit?

This assembly covers many GM full-size trucks and SUVs across model years 2000–2014, including Chevy Silverado, Tahoe, Suburban, Avalanche; GMC Sierra and Yukon; Cadillac Escalade and Hummer H2. Fitment depends on engine displacement and trim — common compatible engines include 4.8L, 5.3L, 6.0L and 6.2L V8 variants.

• Replaces part numbers 15834773 and 22884219 for direct OEM-style replacement.
• Covers Chevy Silverado/Tahoe/Suburban/Avalanche 2000–2014 V8 models listed in product details.
• Includes GMC Sierra/Yukon, Cadillac Escalade and Hummer H2 applications noted in compatibility list.
• Always confirm by entering your make, model and trim in the garage/fitment tool before purchase.

How is the assembly packaged and what comes in the box?

HIHIAV ships this hose assembly in a protective box with the gasket and small parts sealed inside an inner bag to prevent loss or damage during transit. The boxed packaging addresses previous customer reports of loose or missing gaskets and reduces the chance of arrival defects.

• Boxed outer packaging for transit protection.
• Gaskets and small fittings sealed in an internal bag to prevent loss.
• Assembly pre-formed to match original hose routing for easier installation.
• Includes the full inlet and lower radiator outlet hose assembly — no additional hoses required.

What should I expect during installation and maintenance?

Installation is a direct swap where the original heater inlet and outlet hoses are removed and the HIHIAV assembly is fitted in their place. Expect standard coolant drain, clamp removal and hose routing work; a shop manual or repair guide for your specific model year will speed the job.

• Drain coolant to below the work area before removing old hoses.
• Retain or replace clamps as needed; inspect mating surfaces for corrosion or damage.
• Refill and bleed the cooling system per factory procedure to avoid air pockets.
• Check for leaks after warm-up and a short test drive before regular use.

Why choose this aftermarket replacement over a used OEM hose?

This HIHIAV assembly provides a new, boxed replacement that eliminates unknown wear and deterioration found in salvaged parts. New material resists cracking and collapse, restoring reliable coolant flow to the heater core and radiator outlet areas.

• New elastomer and molded fittings instead of unknown used-condition parts.
• Boxed packaging reduces the chance of missing gaskets on arrival.
• Manufactured to match OEM fitment for direct installation and correct routing.
• Ideal when original hoses are brittle, soft, leaking or collapsed.

Who is this for: mechanics, restoration shops and owners of GM full-size trucks and SUVs who need a dependable replacement heater-core supply and lower radiator outlet hose. If your Silverado, Sierra, Tahoe, Suburban, Avalanche, Yukon, Escalade or H2 shows heater issues, visible coolant leaks, or you’re performing a cooling system refresh, this assembly is built to match factory connections and simplify the repair. Always verify vehicle fitment using your model, year and engine before ordering.