Dorman HVAC heater hose assembly 626-111 — direct-fit replacement for GM trucks, temperature-resistant

Designed as a direct-fit replacement for select GM trucks and SUVs, the Dorman 626-111 HVAC heater hose assembly restores heater circuit integrity with durable, temperature-resistant construction.

If your vehicle is one of the compatible Chevrolet, GMC or Cadillac models and years, this Dorman heater hose assembly replaces the factory hose path to restore proper coolant flow through the HVAC heater core. The assembly is engineered to match the original routing and attachment points so installation is straightforward for DIYers and professional technicians alike. It’s constructed to tolerate frequent temperature swings and resist cracking, helping extend service life compared with worn OE hoses.

Will this heater hose assembly fit my vehicle?

Compatibility is specific to model and year. Dorman provides fitment for many Chevrolet, GMC and Cadillac trucks and SUVs from the late 1990s through 2007; however, trim and submodel variations can affect fit. Always verify your exact make, model, year and trim in the vehicle lookup (garage) tool before ordering.

• Fits multiple Chevrolet models: Silverado, Tahoe, Suburban, Avalanche (listed years).
• Fits GMC models: Sierra, Yukon, Yukon XL (listed years).
• Fits Cadillac Escalade and Escalade EXT for specified years.
• Use the garage tool to confirm trim-specific compatibility.

How durable is the Dorman 626-111 compared with the original hose?

This assembly is built to withstand the thermal cycling common in engine cooling and HVAC systems, reducing the chance of premature cracking or leaks. Materials and design target longevity while maintaining OE-style fit so the replacement behaves like the original part under normal operating conditions.

• Engineered materials resist temperature extremes and ozone deterioration.
• Fewer failure points than repeatedly patched factory hoses.
• Constructed to maintain sealing at factory mounting points.
• Intended for long-term replacement rather than temporary repair.

What should I know about installation and service life?

Installation follows the same routing and connection locations as the original factory assembly; basic hand tools and coolant system handling skills are typically sufficient. Replace coolant and properly bleed the system after installation to avoid air pockets and ensure consistent heater performance.

• Designed for direct replacement with original mounting points and connectors.
• Recommended to drain and capture coolant before removal to avoid spills.
• After install, refill and properly bleed the cooling system per vehicle procedures.
• Inspect surrounding clamps, fittings and heater core hoses for wear while servicing.

Why choose a Dorman aftermarket assembly instead of a dealer part?

Dorman focuses on cost-effective replacement parts that match or improve on OE fit and function, often at a lower price than brand dealers. Their heater hose assemblies are engineered to the same routing and attachment specifications so you get a reliable replacement without the premium dealer cost.

• Offers OE-style fit at more affordable pricing than many dealer parts.
• Backed by Dorman’s aftermarket engineering and quality control.
• Supplies an assembled hose path for faster installation versus sourcing multiple pieces.
• Wide availability for common GM trucks and SUVs across model years.

Who is this for: The Dorman 626-111 HVAC heater hose assembly is for owners and technicians of compatible Chevrolet, GMC and Cadillac trucks and SUVs who need a reliable, direct-fit replacement for a leaking, cracked or deteriorated heater hose. It’s aimed at people who prefer a ready-to-install assembly that reproduces factory routing, reduces repeat repairs, and provides a cost-effective alternative to dealer-sourced parts. Before purchasing, confirm your exact vehicle year, make and trim using the garage fitment tool to ensure correct fitment.

Features:

• Ideal replacement: direct swap for the original heater hose on listed vehicles.
• Durable construction: resists cracking and leaking from extreme temperature changes.
• Cost-effective: delivers OEM-style quality at lower cost than many dealer options.
• Industry-informed design: engineered by an aftermarket leader in heater hose assemblies.
• Ensure fit: verify make, model and trim with the garage tool prior to purchase.