Dorman Heater Hose Connector 800-413HP Metal OE-FIX — Direct-Fit, Pressure-Tested

The Dorman 800-413HP is a metal HVAC heater hose quick connector designed to replace brittle plastic OE fittings for a longer-lasting, leak-resistant repair on select Cadillac, Chevrolet and GMC vehicles.

Many factory heater hose quick connectors are made from plastic that becomes fragile after years of heat cycling and abrasion, eventually cracking or releasing from the hose. The Dorman 800-413HP OE FIX connector swaps that vulnerable plastic part for a rugged metal alternative engineered to match factory fit while extending service life. It’s built to precise tolerances so it installs cleanly and performs dependably under pressure.

How does this metal connector reduce the chance of future leaks?

Metal resists heat-related embrittlement and abrasion better than plastic, so the Dorman connector maintains its seal longer under the same operating conditions. Its pressure-tested design helps preserve a secure hose attachment and lowers the chance of return repairs.

• Constructed from durable metal to resist cracking from heat and vibration
• Pressure-tested to verify reliable sealing under HVAC system loads
• Engineered to match the original geometry for consistent hose clamping

Will this part fit my specific Cadillac, Chevrolet or GMC model?

Dorman manufactures the 800-413HP to precise standards for a seamless substitution in compatible vehicles. Always confirm vehicle compatibility using the product’s fitment tool and check any additional notes that appear for your VIN or model year.

• Use the site’s Confirmed Fit bar by entering your vehicle details
• Look for an information icon if extra verification or notes apply
• Verify model year and engine variant to ensure exact fit

How is installation and maintenance different from the original plastic part?

Installation follows the same hose-attachment steps as the factory connector but benefits from the metal part’s dimensional stability, which simplifies reassembly and clamp tightening. Routine inspections are still recommended, but you’ll likely see fewer failures from heat and abrasion over time.

• Installs as a direct replacement using existing hose clamps or clips
• Metal construction resists deformation during tightening for a reliable seal
• Less frequent replacement expected compared with brittle plastic OE parts

What performance checks were done to ensure this is a dependable repair?

The 800-413HP is subjected to performance testing to validate pressure resistance and sealing reliability under HVAC conditions. Those tests help ensure the upgraded design meets or exceeds the service life expectations of the original part.

• Pressure testing to confirm leak-free operation at system loads
• Dimensional verification to match factory routing and connection points
• Durability validation against heat and abrasion scenarios typical in engine bays

Who this is for: Technicians, DIY mechanics and vehicle owners who want a more durable alternative to fragile plastic heater hose quick connectors will benefit from the Dorman 800-413HP. It’s a practical upgrade when repairing HVAC coolant hose failures on supported Cadillac, Chevrolet and GMC models, offering a stronger, pressure-tested replacement that aims to reduce repeat repairs and maintain a factory-like fit.

Features:

• Upgraded metal construction for longer-lasting repairs compared with plastic OE connectors
• Engineered to resist heat and abrasion that cause plastic connector failure
• Direct replacement built to precise standards for seamless fit on specified vehicles
• Performance-tested design to help ensure reliable operation
• Confirm fitment by entering your vehicle and reviewing any fit notes