Gates 19023 HVAC Heater Hose

Gates 19023 Molded Heater Hose

The Gates 19023 molded heater hose is an OEM-style coolant hose built for tight engine compartments where a straight hose will not route correctly. Made from EPDM, it serves coolant, water, and air applications and is also approved for marine use.

Compatible With 1987-1999 Chevrolet and GMC trucks, SUVs, and full-size utility models in listed heater and auxiliary heater pipe locations, this molded hose supports direct-fit service on many C/K-series and Suburban applications.

Key Features

• Factory-molded shape for compact engine bay routing
• EPDM construction for heater and coolant service
• OEM-style replacement hose for selected Chevrolet and GMC applications
• Approved for coolant, water, air, and marine applications
• End inside diameters: 16 mm (.62 in) and 19 mm (.75 in)
• Centerline length: 343 mm (13.5 in)
• Part number 19023 for catalog and fitment lookup

Product Details

Gates Molded Heater Hose line products are built to match the routing needs of modern and legacy cooling systems, especially where space is limited around the engine. The 19023 hose follows a molded OEM-style profile to help maintain proper hose alignment between heater pipes, auxiliary heater connections, and intake manifold routing on listed vehicles. This part cross-references Four Seasons 86029 for the same application.

Use Gates 19023 when servicing heater hose routing on 1997-1999 Chevrolet C1500, C2500, K1500, Tahoe, and Suburban models, as well as matching GMC C/K and Yukon applications shown in the fitment data. It also covers select 1987-1991 Chevrolet and GMC heater-to-pipe applications and 1995 Chevrolet and GMC heater-to-intake-manifold locations.

What It Helps Fix

• Cracked or hardened heater hose material
• Leaking coolant at molded hose bends
• Poor hose routing in tight engine compartments
• Incorrect fitment from universal straight hose replacements
• Service issues on auxiliary heater pipe connections

Installation Notes

• Verify the hose end diameters and centerline length before installation.
• Match the vehicle’s heater, auxiliary heater, or intake manifold routing exactly as listed.
• Check surrounding clamps, pipes, and fittings for wear before reassembly.
• Confirm engine configuration notes such as A/C or auxiliary heater requirements on the vehicle application.

Quality Assurance

Gates 19023 is an EPDM molded heater hose built to Gates’ OEM-style standards for fit and routing accuracy. Its factory-molded construction supports consistent replacement on the listed Chevrolet and GMC applications.