Dorman 800-706 Automatic Transmission Oil Cooler Line Connector

Automatic Transmission Oil Cooler Line Connector

This Dorman automatic transmission oil cooler line connector restores the connection between the transmission and the oil cooler when the original fitting is damaged or leaking. Built from metal with a straight fitting angle, it is made to match OE fit and function for a leak-free repair on select Chevrolet and GMC trucks and SUVs.

• Metal construction for serviceable durability
• Straight fitting design for a direct line connection
• Male inverted flare end and male thread end
• 0.75 in fitting size on end 1 and 0.875 in fitting size on end 2
• Replacement for OE part number 15194557
• Dorman 800-706 for transmission oil cooler line repair

Fitment Details

Compatible with 2003 Chevrolet Avalanche 2500, radiator side; 2003 Chevrolet Silverado 2500 HD, radiator side; 2003 Chevrolet Silverado 3500, radiator side; 2003 Chevrolet Suburban 2500, radiator side; 2003 GMC Sierra 2500 HD, radiator side; 2003 GMC Sierra 3500, radiator side; and 2003 GMC Yukon XL 2500, radiator side. These applications use a 5/8 in. quick connector with a 7/8 in. thread, with Allison automatic transmission excluded on Silverado 2500 HD, Silverado 3500, Sierra 2500 HD, and Sierra 3500.

Detailed Description

Dorman 800-706 is an automatic transmission oil cooler line connector engineered to restore the seal between the transmission and the cooler circuit. The metal body, straight layout, and OE-style end configurations support a proper connection where the original connector has cracked, corroded, or begun to seep. This part cross-references OE number 15194557 for the same application. It is a practical replacement for 2003 Chevrolet Avalanche 2500, Silverado 2500 HD, Silverado 3500, Suburban 2500, and select 2003 GMC Sierra and Yukon XL models that use the specified radiator-side cooler line connection.

Common Repair Issues

• Transmission fluid leaking at the cooler line connection
• Damaged or corroded original oil cooler line connector
• Poor sealing between the transmission and radiator-side cooler circuit
• Loose or worn threaded connection at the cooler line fitting
• Service interruption caused by a failed OE-style connector

Installation Notes and Tips

Verify the radiator-side cooler line style, thread size, and transmission application before installation. Confirm the vehicle is one of the listed 2003 Chevrolet or GMC models and check the Allison transmission exclusion where noted. The connector does not include thread sealer, so use the correct sealing method for the application and inspect the mating line and threads for wear before assembly.

Quality Assurance

Dorman manufactures replacement components that match original equipment fit and function for repair applications. Part number 800-706 is built to restore the cooler line connection with the specified OE-style dimensions and materials.