CSF 20027 Automatic Transmission Oil Cooler

Automatic Transmission Oil Cooler for GM Trucks

CSF 20027 is a parallel flow automatic transmission oil cooler built for GM full-size trucks with 5-speed automatic applications. It uses quick fitting inlet and outlet connections for a direct-style service replacement on select Chevrolet Silverado and GMC Sierra models.

Key Features

• Parallel flow construction for efficient transmission fluid cooling
• Core dimensions: 1 in. thickness, 6 3/7 in. width, 12 in. length
• Quick fitting inlet and outlet tube connections
• Fits select 1999-2007 Chevrolet Silverado and GMC Sierra 5-speed applications
• CSF part number 20027 for catalog and service reference

Detailed Description

CSF 20027 is an automatic transmission oil cooler engineered for select Chevrolet Silverado and GMC Sierra trucks, including Silverado 1500, Silverado 1500 HD, Silverado 2500 HD, Sierra 1500, Sierra 1500 HD, and Sierra 2500 HD applications. The parallel flow core design supports fluid heat transfer in a compact package, while the quick fitting inlet and outlet connections simplify line attachment on vehicles equipped with the listed 5-speed transmissions. This part cross-references Carlson 19027 for the same application.

Use CSF 20027 when replacing a leaking, restricted, or heat-stressed transmission cooler on compatible Silverado and Sierra trucks. The compact core size and OE-style connection layout make it a practical service part for maintaining transmission fluid temperature control in daily driving, towing, and stop-and-go use.

What It Helps Address

• Transmission fluid overheating
• Cooler leakage at the core or fittings
• Restricted fluid flow through a damaged cooler
• Heat-related transmission performance concerns
• Service replacement for worn factory cooler assemblies

Installation Notes and Tips

Verify the vehicle’s transmission configuration before ordering, since fitment is limited to the listed 5-speed applications. Confirm inlet and outlet connection style, cooler dimensions, and line routing against the original unit before installation. Inspect transmission lines and fittings for wear or contamination during replacement, and flush the system as needed to remove debris from the failed cooler.

Quality Assurance

CSF 20027 is built as a dedicated transmission cooling component for the listed GM truck applications. Its parallel flow construction and OE-style quick fitting connections support accurate service replacement on compatible Chevrolet Silverado and GMC Sierra models.