Dorman 626-683 HVAC Heater Hose Assembly - Outlet

Durable HVAC Heater Hose Assembly for GM Trucks and SUVs

The Dorman 626-683 HVAC heater hose assembly is engineered to provide reliable heating system performance for select Cadillac, Chevrolet, and GMC vehicles. Constructed from EPDM material, this black straight hose assembly is designed to withstand typical operating pressures and temperature ranges found in automotive heating systems.

• Made from durable EPDM rubber for heat and chemical resistance
• Includes clamps for secure installation
• Straight hose shape with a maximum bend angle of 90 degrees
• Multiple inside diameters: 0.6", 0.75", and 1" ends for precise fit
• Maximum working pressure of 50 psi and burst pressure of 100 psi
• Centerline length of approximately 1047 mm (41.2 inches)
• Compatible with various GM full-size trucks and SUVs

Product Details and Specifications

The Dorman 626-683 heater hose assembly is designed as a standard replacement part, meeting OEM specifications for fit and function. Its EPDM construction offers resistance to heat, ozone, and coolant chemicals, ensuring durability in demanding engine bay environments. The hose assembly features three different inside diameters at each end (0.6", 0.75", and 1") to accommodate specific heater core and engine connections. The included clamps facilitate a secure and leak-free installation. This hose assembly does not contain any internal springs or protective sleeves, maintaining a straightforward design optimized for reliable coolant flow.

Compatible Vehicles and Applications

This heater hose assembly is compatible with a range of General Motors vehicles, including:

• Cadillac Escalade, Escalade ESV, Escalade EXT
• Chevrolet Avalanche, Cheyenne, Silverado 1500, 2500, 2500 HD, 3500, 3500 HD, Suburban 1500, Suburban 2500, Tahoe
• GMC Sierra 1500, Sierra 2500 HD, Sierra 3500 HD, Yukon, Yukon XL 1500, Yukon XL 2500

Use this part to replace worn or damaged heater hoses in these models to restore proper heating system operation.

Common Issues Addressed by This Heater Hose Assembly

• Heater core leaks caused by cracked or brittle hoses
• Coolant leaks due to failed hose connections or clamps
• Reduced heater performance from restricted or collapsed hoses
• Overheating issues related to coolant flow interruptions
• Preventative maintenance to avoid unexpected heater system failures

Installation Notes and Tips

Before installation, ensure the engine is cool and the cooling system is depressurized. Inspect all hose connections and clean mating surfaces to ensure a proper seal. Use the included clamps to secure the hose ends firmly, avoiding overtightening which can damage the hose. Verify hose routing matches OEM specifications to prevent kinks or excessive bends beyond the 90-degree maximum bend angle. After installation, refill and bleed the cooling system as required to remove air pockets.

Quality Assurance and Warranty

Dorman parts are manufactured to meet or exceed OEM standards for quality and durability. The 626-683 heater hose assembly undergoes rigorous testing to ensure reliable performance under normal operating conditions. While specific warranty details are not provided here, Dorman typically offers limited warranties covering defects in materials and workmanship. Consult product documentation or the manufacturer for exact warranty terms.