Hayden 380 Automatic Transmission Oil Cooler Line Connector

Hayden 380 Oil Cooler Fitting Kit

The Hayden 380 is an oil cooler accessory fitting kit for automatic transmission oil cooler line connections. It is performance rated and built for applications that require a 5/8" snap-in adapter to connect to an oil cooler with 7/8"-14 O-ring threads.

Use this Hayden Oil Cooler Acc part when servicing or adapting transmission cooler line connections on select Chevrolet and GMC trucks and SUVs, including Silverado, Sierra, Avalanche, Suburban, Yukon, and related models.

Key Features

• Automatic transmission oil cooler line connector accessory
• Performance rated for demanding cooling-system service
• Fitting kit style for oil cooler connection applications
• Designed for use with 5/8" snap-in adapter and 7/8"-14 O-ring thread oil cooler ports
• Hayden part number 380 for direct identification

Application Details

This Hayden Oil Cooler Acc fitting kit is used in transmission cooler line service where the vehicle uses a 5/8" snap-in adapter to connect the oil cooler with 7/8"-14 O-ring threads. It is listed for 2001-2007 Chevrolet and GMC applications, including 2001-2006 Chevrolet Silverado 2500 HD, 2001-2006 Chevrolet Silverado 3500, 2001-2006 GMC Sierra 3500, 2001-2005 GMC Yukon XL 1500, and 2007 Chevrolet Silverado 2500 HD Classic. The Hayden 380 also cross-references 240380 and 800726 for the same application.

What It Helps Address

• Transmission cooler line connection service on vehicles with O-ring threaded oil cooler ports
• Replacement of worn or damaged oil cooler line connector components
• Adaptation between cooler line fittings and the oil cooler connection point
• Leak concerns at the transmission oil cooler line interface
• Fitment issues during oil cooler line repair on Silverado, Sierra, and Yukon applications

Installation Notes

Confirm the oil cooler port style before installation. This part is specified for use with a 5/8" snap-in adapter and 7/8"-14 O-ring threads, so matching the connection type is essential for proper fitment. Verify the vehicle year, make, and model against the listed applications before ordering. Hayden 380 is also referenced by the part number 380 in catalog listings.

Quality Assurance

Hayden identifies this as a performance rated oil cooler accessory fitting kit. Use the listed application data and connection specifications to confirm the correct part for your transmission cooling repair.