Dorman 800-603 Automatic Transmission Oil Cooler Line Connector

Reliable Automatic Transmission Oil Cooler Line Connector

The Dorman 800-603 automatic transmission oil cooler line connector is engineered to provide a secure and durable connection for transmission cooling systems. Designed specifically for Chevrolet and GMC trucks and SUVs, this steel connector ensures efficient fluid transfer and system integrity.

• Constructed from durable steel for long-lasting performance
• Features a straight fitting angle with a hex shape for easy installation
• End 1 includes a quick disconnect fitting with multiple size options (3/8 in to 1 in)
• End 2 has a metric threaded male fitting with a 16.5 mm outside diameter
• Compatible with various Chevrolet and GMC models including Blazer, Tahoe, Yukon, and multiple C/K and Express series trucks

Product Details and Specifications

The Dorman 800-603 transmission line connector is designed with precision to meet SAE standards, ensuring compatibility and reliability in automatic transmission cooling systems. The connector measures 29.25 inches along its length axis, providing adequate reach for installation in tight engine compartments. The hex-shaped body allows for secure tightening with standard tools. End 1 features a quick disconnect fitting attachment, facilitating easier maintenance and replacement, while End 2 uses a metric threaded male connection for a secure seal. This part does not include mounting hardware or thread sealer, so proper installation preparation is recommended.

Compatible Vehicles and Applications

This transmission oil cooler line connector is compatible with a range of Chevrolet and GMC vehicles, including:

• Chevrolet Blazer, Tahoe, Yukon
• GMC C1500, C2500, C3500, K1500, K2500, K3500 series trucks and Suburbans
• Chevrolet and GMC Express 1500, 2500, 3500 vans
• GMC P30, P3500, Savana 1500, 2500, 3500 vans

Common Issues Addressed by This Connector

• Leaking or damaged transmission oil cooler line connections
• Corrosion or wear in original transmission line fittings
• Difficulty in disconnecting or reconnecting transmission cooler lines
• Incompatibility with metric and SAE fitting standards
• Transmission fluid loss due to faulty connectors

Installation Notes and Tips

Ensure the transmission system is depressurized before beginning installation. Use appropriate tools to tighten the hex-shaped connector securely without over-torquing. Since mounting hardware and thread sealer are not included, apply a compatible thread sealant to the metric threaded end if necessary. Verify the quick disconnect fitting is fully engaged to prevent leaks. Inspect surrounding hoses and lines for wear during installation to maintain system integrity.

Quality Assurance and Warranty

Dorman parts are manufactured to meet or exceed OEM specifications, providing reliable performance for your vehicle’s transmission cooling system. The 800-603 transmission line connector is backed by Dorman’s limited warranty, covering defects in material and workmanship under normal use. For specific warranty details, refer to Dorman’s official documentation.