ACDelco 25999420 Automatic Transmission Fluid Cooler Line Assembly

The ACDelco 25999420 is a GM Genuine Parts automatic transmission fluid cooler inlet and outlet line assembly designed to replace worn or leaking transmission cooler lines on select General Motors vehicles equipped with heavy-duty cooling systems. This OE-quality hose assembly features durable steel tubing and reinforced rubber hose construction to withstand high fluid pressures and extreme temperatures.

Key Features:

• GM Genuine Parts quality - true OE replacement validated by General Motors
• Steel and flexible rubber reinforced construction for durability
• Designed for vehicles with heavy-duty transmission cooling systems
• Pre-formed to exact OE specifications for proper fit and routing
• Features quick-disconnect fittings at cooler connections
• Transfers transmission fluid between transmission and external cooler
• Engineered and tested to rigorous GM standards

This transmission cooler line assembly is specifically designed for GM trucks and SUVs with auxiliary or heavy-duty transmission cooling packages. The assembly includes both metal hard lines and flexible rubber hose sections with crimped connections. Common applications include Chevrolet Tahoe, Suburban, Silverado, GMC Yukon, Sierra, and Cadillac Escalade models with factory heavy-duty cooling systems. This part was formerly branded as ACDelco GM Original Equipment and provides the same performance, durability, and service life expected from General Motors.

Installation Note: Verify your vehicle has the heavy-duty cooling system before ordering. Vehicles with standard cooling may require different part numbers. Professional installation recommended due to complex routing through chassis components.