QFISH Engine Lower Heater Outlet Radiator Hose for Chevy/GMC V8s — Black ABS/Rubber Direct-Fit Replacement (OE 15834773)

QFISH Engine Lower Heater Outlet Radiator Hose is a direct-fit replacement hose and outlet assembly built from rubber and ABS to restore coolant flow on compatible Chevy, GMC, Hummer, and Cadillac V8 vehicles.

If your vehicle shows symptoms like coolant leaks, soft spots in the hose, or heater performance changes, a worn lower heater outlet can be the source. This QFISH assembly replaces OE numbers 15834772, 15834773, 15792821, 15854959 and related references, providing a ready-to-install unit engineered for the original mounting points and hose connections. The assembly is constructed with durable rubber and ABS plastic to resist wear and corrosion, and it’s supplied after inspection so you get a serviceable part that fits without modification.

How does this assembly match my original part?

The QFISH lower heater outlet is designed to meet the fitment and connection layout of the original equipment. It aligns with factory mounting tabs, hose diameters, and thermostat housing proximity so installation follows stock routing. Buyers should compare OE numbers and visual fit before purchasing to ensure compatibility.

• Direct replacement for OE numbers: 15834772, 15834773, 15792821, 15854959, 626-553
• Original-style mounting and hose connector geometry
• Sold as a complete lower outlet with integrated hose connection

What materials and durability features does it offer?

This unit uses molded rubber for the hose portion and ABS plastic for the outlet body to balance flexibility and impact resistance. Those materials are chosen to withstand heat cycling and exposure to coolant without becoming brittle quickly. The construction aims to minimize cracking, swelling, and corrosion at connection points.

• Molded rubber hose for flexibility and vibration resistance
• ABS outlet body for dimensional stability and impact strength
• Wear- and corrosion-resistant design for extended service life

Which vehicles will this part fit?

This assembly fits a range of GM trucks and SUVs where the referenced OE numbers were used. Typical applications include Chevy Silverado, Tahoe, Avalanche, Suburban; GMC Sierra and Yukon; Hummer H2; and Cadillac Escalade models with the matching cooling layout. Always cross-check model year and engine option with the provided OE references.

• Chevy: Silverado, Tahoe, Avalanche, Suburban
• GMC: Sierra 1500/2500/3500, Yukon 1500/2500
• Hummer H2 and Cadillac Escalade when OE matches

How difficult is installation and what should I prepare?

Installation is typically straightforward for anyone comfortable with routine coolant-system work. The unit is a direct-fit replacement that bolts into the original location, but plan to drain the cooling system, have replacement coolant ready, and inspect hose clamps and adjacent hoses while you work. If unsure, a mechanic can complete the swap in a short shop visit.

• Drain coolant to below the outlet level before removal
• Replace old clamps and inspect surrounding hoses for wear
• Refill and bleed coolant per vehicle procedure after installation

Who this is for: Technically-minded DIYers, independent repair shops, and fleet maintainers who need a dependable, OE-number-matching lower heater outlet and hose assembly for GM V8 trucks and SUVs. If you value a direct-fit replacement with durable rubber and ABS construction and want to avoid extended downtime or custom plumbing, this QFISH assembly is engineered to simplify the swap and restore coolant routing efficiently.