QFISH Radiator Lower Heater Outlet Hose for Chevy/GMC Trucks and SUVs — Direct-Fit ABS & Rubber Assembly (Replaces OE 15834773)

QFISH Engine Lower Heater Outlet Radiator Hose is a direct-fit replacement hose assembly for select Chevy, GMC, Hummer H2 and Cadillac Escalade models, built from durable rubber and ABS for reliable coolant flow.

This replacement lower heater outlet and radiator hose assembly is made to match the fit and function of original equipment for a range of GM trucks and SUVs. It replaces OE numbers 15834772, 15834773, 15792821, 15854959 and related references, providing a straightforward swap for owners maintaining Silverado, Sierra, Tahoe, Yukon, Avalanche, Suburban, Hummer H2 and Escalade models. The assembly combines high-grade rubber sections with ABS fittings to resist wear, resist corrosion, and reduce the risk of leaks compared with aging factory parts.

Will this hose fit my vehicle and which part numbers does it replace?

This QFISH assembly is designed as a direct replacement for specific GM vehicles and matches the mounting points and diameters of the original part. Check your vehicle’s year and engine layout against the compatible models and OE references to confirm fit before purchase.

• Replaces OE numbers: 15834772, 15834773, 15792821, 15854959, 626-553, 626553, 22554, 88412.
• Compatible with: Chevy Silverado, Tahoe, Avalanche, Suburban; GMC Sierra 1500/2500/3500, Yukon 1500/2500; Hummer H2; Cadillac Escalade.
• Works as a direct-fit component—no custom trimming needed.

How durable and reliable is the QFISH lower heater outlet hose?

The assembly uses quality rubber and ABS plastic engineered to withstand engine bay temperatures and coolant exposure. Materials are chosen for wear resistance and reduced cracking, helping extend service life compared with deteriorated OEM hoses.

• Wear-resistant rubber sections minimize premature failure.
• ABS fittings resist corrosion and keep secure connections.
• Manufactured and inspected to reduce defects prior to shipping.

How difficult is installation and what tools or steps are required?

This hose assembly is made for direct installation without modification and is suitable for experienced DIYers or professional mechanics. Typical installation requires draining part of the cooling system, removing the old hose, transferring any necessary clamps or sensors, and fitting the new assembly in place.

• Basic hand tools: screwdrivers, pliers, ratchet and sockets.
• Allow time to safely drain and refill coolant; follow torque and clamp recommendations.
• QFISH offers support if you have installation questions.

What should I expect from fit, function and warranty support?

Expect a product that replicates factory geometry to restore original coolant routing and heater performance. QFISH inspects each item before shipping and provides customer assistance if issues arise; check the seller listing for return and warranty terms specific to your purchase.

• Direct replacement intended to match factory connections and lengths.
• Pre-shipment quality checks reduce the chance of receiving defective parts.
• Customer support available for fitment or installation questions.

Who is this for: Owners and technicians working on GM full-size pickup trucks and SUVs—especially those replacing a cracked, leaking or age-hardened lower heater outlet or radiator hose. It’s suitable for mechanics doing routine cooling system repairs, fleet maintenance teams needing a dependable OE-style replacement, and DIYers comfortable with coolant system service who want a long-lasting, compatible assembly backed by pre-shipment inspection and vendor support.