Dorman 800-414HP Metal Heater Hose Connector Compatible

The Dorman 800-414HP is a metal heater hose/coolant hose connector engineered to replace brittle plastic OE units and deliver a longer-lasting, leak-resistant repair for select Cadillac, Chevrolet and GMC vehicles.

Over time, original plastic heater hose connectors can become brittle from heat cycling and road abrasion, leading to cracks, leaks and sudden failures. Rather than reinstalling another plastic piece, the Dorman 800-414HP OE FIX connector swaps in a more durable metal component that matches the original fit while outlasting it in real-world conditions. It’s built to factory dimensions for straightforward installation and has been pressure-tested to help restore reliable coolant and HVAC hose connections.

Will this metal connector fit my Cadillac, Chevrolet or GMC?

The Dorman 800-414HP is manufactured to the vehicle-specific dimensions used by many GM models, but fitment can vary by year and engine configuration. Always use the online garage tool and Confirmed Fit indicator to verify compatibility with your exact VIN or vehicle profile.

• Designed to meet OEM size and mounting points for specified models
• Check the Confirmed Fit bar on the product page before ordering
• Look for the blue “i” icon for fitment notes that may require extra verification

How does replacing plastic with metal help durability?

Metal resists the heat, abrasion and deformation that commonly cause plastic connectors to crack or separate from hoses. Using a rugged metal replacement reduces the chance of repeat failures in the same spot and can provide a longer service life under thermal and mechanical stress.

• Improved resistance to high under-hood temperatures
• Less susceptible to abrasion from rubbing hoses or components
• Pressure-tested design intended for reliable coolant/HVAC sealing

Is installation similar to the original part?

Yes — the Dorman OE FIX approach aims to keep installation familiar by matching the original geometry and connection points. That lets you use the same hoses and clamps in most cases, keeping labor simple while upgrading the material for longevity.

• Direct-replacement sizing for seamless installation
• Typically reuses existing hose and clamp hardware
• Follow vehicle-specific instructions and torque recommendations during installation

What testing and quality checks does this connector undergo?

This upgraded connector has been subjected to performance and pressure testing to confirm it maintains a secure seal under normal cooling system loads. Manufacturing tolerances are controlled to ensure consistent fit and function across production runs.

• Pressure-tested to validate leak resistance
• Manufactured to precise dimensional standards for repeatable fit
• Designed as an OE FIX alternative to avoid repeat plastic failures

Who is this for: The Dorman 800-414HP metal heater hose connector is intended for DIY mechanics, independent technicians and fleet managers repairing select Cadillac, Chevrolet or GMC models where the original plastic connector has cracked, leaked or failed prematurely. Choose this part if you want a direct-fit replacement that improves durability without redesigning the hose system; confirm fitment with the vehicle lookup before purchase.