AUTOKAY HVAC Inlet Heater Hose for GM SUVs — Fits 20765678 (Buick Enclave 2008-2017) Durable Direct-Fit

The AUTOKAY 20765678 HVAC inlet heater hose is a direct-fit replacement hose engineered to restore proper coolant flow for heating systems on compatible GM SUVs.

This replacement heater hose is manufactured to match the fit and function of GM part number 20765678 and is intended for use on a range of Buick, GMC, Chevrolet and Saturn models from 2007 through 2017. Built as a like-for-like service part, it connects the engine cooling system to the HVAC heater core to ensure warm-air delivery and reliable coolant circulation. The part listing below shows compatible vehicles so you can confirm fitment before installation.

Will this hose fit my vehicle model and year?

Compatibility is determined by the original GM part number and the model year range listed. AUTOKAY designed this hose to replace part number 20765678 and to fit multiple GM SUVs across specific production years.

• Fits Buick Enclave: 2008–2017
• Fits GMC Acadia: 2007–2016; Acadia Limited 2017
• Fits Chevrolet Traverse: 2009–2017
• Fits Saturn Outlook: 2007–2010

How does this replacement heater hose affect HVAC performance?

Replacing a worn or leaking inlet heater hose restores the coolant path to the heater core, which helps the HVAC system reach and maintain cabin warmth more reliably. A proper-fit hose minimizes leaks and pressure loss that can reduce heating efficiency or lead to engine overheating if coolant levels fall.

• Restores full coolant flow to the heater core for consistent cabin heat.
• Reduces risk of external coolant leaks and low-coolant conditions.
• Maintains proper system pressure and reduces air intrusion into cooling loop.

What should I check before installing this part?

Confirm the OEM part number, inspect surrounding connectors, and verify that the hose routing matches the original installation. Replacing clamps or checking mating surfaces for corrosion will improve sealing and long-term reliability.

• Compare part number 20765678 to your existing hose for exact match.
• Inspect inlet and outlet fittings, valves, and clamps for wear or damage.
• Flush or top off coolant after installation and bleed air pockets per manufacturer procedure.

What are the physical and performance benefits of choosing this AUTOKAY hose?

The hose is manufactured to meet expected fit, flexibility, and heat resistance for its application. Choosing a direct-fit replacement shortens installation time and reduces the chance of improper routing or premature failure due to mismatched dimensions or material quality.

• Direct-fit design mirrors OEM dimensions for straightforward installation.
• Durable material resists heat and coolant exposure for reliable service life.
• Designed to integrate with existing clamps and mounting points without modification.

Who is this for: This AUTOKAY 20765678 heater hose is aimed at DIY mechanics, independent repair shops, and fleet owners who need a dependable, OEM-compatible replacement for GM SUVs listed above. If your vehicle shows heater-core leaks, low-coolant symptoms, or reduced cabin heat and you confirm the original part number, this hose provides a practical service replacement that restores system integrity without unnecessary modification.