LOCOZI Heater Inlet & Outlet Hoses for Chevy Silverado GMC Sierra 2014–2019 — Direct-Fit OEM Replacement (23126442/23126443)

These LOCOZI heater inlet and outlet hoses are direct-fit HVAC replacements engineered to restore proper coolant flow to the heater core for select 2014–2019 Chevrolet Silverado and GMC Sierra models.

If your truck is showing coolant leaks near the firewall, poor cabin heat, or you see bulging or cracked heater hoses, replacing the inlet and outlet hoses is a simple, cost-effective repair. LOCOZI supplies two hoses—heater inlet and heater outlet—that match OEM routing and fitment numbers (23126442, 23126443 and related part numbers) so installation is straightforward and reliable.

Which trucks and years will these hoses work with?

These hoses are made to fit specific Chevrolet and GMC pickup models from mid-2010s generations. Confirm compatibility by matching your vehicle year and model with the listed fitment or by checking the OEM part numbers against your current hoses.

• Compatible with 2014–2018 Chevrolet Silverado 1500 and 2500, and 2014–2019 GMC Sierra 1500.
• Fits 2018 Chevrolet Cheyenne and 2019 GMC Sierra 1500 Limited models where applicable.
• Replaces OEM part numbers 23126442, 23126443, 24479, 24478, 84919465, 84919467.

How hard is installation and what tools do I need?

Installation is designed to be user-friendly; these hoses are direct replacements that follow factory routing so no special fabrication is required. A basic set of hand tools and some coolant capture supplies are typically all that’s necessary.

• No special tools required—common hand tools suffice.
• Direct-fit design uses original connection points and clamps.
• Expect a moderate DIY job: draining some coolant and careful clamp removal are needed.

What materials and quality controls are used for these heater hoses?

LOCOZI manufactures these hoses from durable, heat-resistant materials formulated to resist high under-hood temperatures and vibration. Each hose undergoes testing to ensure proper fit, flexibility, and long-term performance under normal driving conditions.

• Heat- and vibration-resistant rubber compounds for durability.
• Factory-style molding and bends to maintain correct routing.
• Tested for seal integrity and dimensional accuracy before packaging.

What comes in the package and what should I check before installation?

The package contains both the heater inlet and heater outlet hoses so you can replace the pair at once, reducing the chance of a near-future failure on the remaining hose. Inspect the hoses and compare them to your old parts to ensure the bends and connection diameters match before starting work.

• Includes 1 x heater outlet HVAC hose and 1 x heater inlet HVAC hose.
• Verify fitment by comparing OEM numbers and hose shapes to the originals.
• Check clamps and connectors; replace worn clamps for the best seal.

Who is this for? These LOCOZI heater inlet and outlet hoses are intended for owners and technicians working on 2014–2019 Chevrolet Silverado and GMC Sierra trucks (including certain Cheyenne and Sierra Limited models) who need a reliable, OEM-style replacement. Ideal for DIY mechanics who want a straightforward swap and for repair shops looking to stock dependable heater hoses that match OEM fitment numbers.