Dorman 926-866 A/C Hose Assembly - Rear

Dorman 926-866 Rear A/C Hose Assembly

Dorman 926-866 is a rear A/C hose assembly for vehicles with an auxiliary evaporator and auxiliary heater in the rear HVAC system. This OE FIX multi-piece design replaces a one-piece rear A/C line with a threaded, sectioned layout that simplifies routing through the vehicle while supporting a leak-resistant repair.

Key Features

• OE FIX multi-piece rear A/C line kit for easier installation
• Threaded fittings join the sections for a secure connection
• Aluminum and rubber construction for HVAC routing and flexibility
• Designed for high and low side refrigerant service
• Built for R12 and R134A refrigerant systems
• Includes seals and fittings as listed in the product data
• Direct replacement for rear HVAC line service on Cadillac Escalade, Chevrolet Tahoe, and GMC Yukon

Detailed Description

This Dorman A/C hose assembly is engineered for rear HVAC repairs where the original line routes through the vehicle and can be difficult to replace as a single piece. The multi-piece layout reduces the challenge of threading a long rear A/C line into place, while the threaded connection points are intended to support a leak-free repair. The assembly uses aluminum and rubber materials, molded hose construction, and is specified for both high and low system pressure service. It is listed for R12 and R134A refrigerant applications and is a direct-fit solution for rear auxiliary evaporator to auxiliary heater routing on 2007-2014 Cadillac Escalade, 2007-2014 Chevrolet Tahoe, and 2007-2014 GMC Yukon. Part number 926-866 is also referenced for OE-style replacement needs in these rear HVAC applications.

What It Helps Repair

• Rear A/C line leaks caused by aging or damaged hose sections
• Failed rear HVAC routing from corrosion, cracking, or wear
• Service issues on auxiliary evaporator to auxiliary heater lines
• Replacement needs after rear A/C line removal or damage during repair
• Fitment-specific rear HVAC repairs on Escalade, Tahoe, and Yukon models

Installation Notes and Tips

Verify the vehicle’s rear HVAC layout before installation and confirm the line routing matches the auxiliary evaporator to auxiliary heater configuration. Inspect mating surfaces, replace seals as needed, and confirm all threaded connections are fully seated before charging the system. This part number 926-866 is listed for rear position applications only and should be matched to the vehicle’s refrigerant and pressure requirements.

Quality Assurance

Dorman OE FIX parts are built to address service challenges found in original designs by simplifying replacement and improving serviceability. This assembly is specified with fittings and seals as listed in the product data and is engineered for rear HVAC repair on the confirmed Cadillac Escalade, Chevrolet Tahoe, and GMC Yukon applications.