One Stop Solutions 2857 Radiator

Radiator for Heavy-Duty GM Trucks

This OSC Premium radiator is built for direct replacement service in select Chevrolet Silverado HD and GMC Sierra HD applications. Part number 2857 is engineered around OE form and function, with a crossflow design, plastic tanks, and a premium aluminum core for dependable cooling performance.

Key Features

• Crossflow radiator design with 2-row core construction
• Core dimensions: 33 15/16 in. height, 23 5/16 in. width, and 2-3/16 in. thickness
• Plastic tank construction with PA core material
• Transmission oil cooler included with plated cooler type
• Inlet and outlet header lengths: 24 5/8 in.
• Inlet diameter: 1 13/16 in.; outlet diameter: 2 1/16 in.
• No engine oil cooler and no cap included
• Built for drop-in fit, form, and function

Detailed Description

OSC part number 2857 is a premium new automotive radiator designed for OE-style replacement in 2006-2010 Chevrolet Silverado 2500 HD, 2007-2010 Chevrolet Silverado 3500 HD, 2006-2010 GMC Sierra 2500 HD, and 2007-2010 GMC Sierra 3500 HD applications, along with 2007 Silverado and Sierra Classic HD models and 2006 Silverado 3500 and Sierra 3500 trucks. It uses premium-grade components, cadmium-plated tubes, and a die-cut gasket to help maintain sealing integrity. The radiator is individually pressure tested and built with factory-spec fitted and torqued components for consistent installation and cooling performance. This part cross-references Spectra Premium CU2857 for the same application.

Common Cooling System Issues It May Address

• Coolant leaks from a damaged or aging radiator tank or core
• Reduced cooling efficiency in high-mileage Silverado HD and Sierra HD trucks
• Transmission heat buildup when the integrated cooler is no longer performing properly
• Cracked fittings, weakened seals, or corrosion-related radiator failure
• Overheating caused by worn internal radiator components

Installation Notes and Tips

Verify core dimensions, inlet and outlet sizes, and transmission cooler layout before installation. This radiator is designed for direct replacement service in the listed Chevrolet Silverado HD and GMC Sierra HD applications, including 2007 Classic models where shown. Confirm vehicle year, model, and cooling configuration against the original unit before removal to ensure proper fitment.

Quality Assurance

OSC tests the transmission and engine oil coolers before tank installation, checks the core before assembly, and tests the completed radiator again after assembly. The design includes engineering updates aimed at improving durability and cooling life in demanding truck applications.