One Stop Solutions 2946 Radiator

Radiator for Silverado and Sierra 1500

Restore cooling performance with this OSC Premium radiator, part number 2946. Built for select Chevrolet Silverado 1500 and GMC Sierra 1500 applications, it follows OE-style form and function with a crossflow design, plastic tanks, and a premium aluminum core construction.

Key Features

• OE-style radiator design for direct replacement service
• Crossflow configuration with plastic tanks and a PA core material
• Transmission oil cooler included with plated cooler construction
• Premium tubes, fins, headers, and tanks for added durability
• Individually pressure tested during production
• Drop-in fit for select Silverado 1500 and Sierra 1500 applications
• Part number 2946 for easy identification

Detailed Description

OSC part number 2946 is engineered as a premium new automotive radiator for vehicles that require OE form and function. It uses a crossflow layout with a 34-inch core height, 17 1/4-inch core width, and 1-inch core thickness, along with 1 5/16-inch inlet and 1 9/16-inch outlet connections. The radiator includes a plated transmission oil cooler and is built with factory-style fitment in mind for 2005-2011 Chevrolet Silverado 1500 and 2006-2013 GMC Sierra 1500 applications. This radiator is a practical choice for drivers searching for a 2006-2013 GMC Sierra 1500 radiator replacement or a 2005-2011 Chevrolet Silverado 1500 cooling system repair part.

This part cross-references Spectra Premium CU2423 for the same application.

What It Helps Address

• Overheating caused by a worn or leaking radiator
• Transmission cooling concerns tied to a failing cooler circuit
• Reduced coolant flow from internal radiator restriction
• Heat-related stress in high-mileage Silverado 1500 and Sierra 1500 trucks
• Leaks at tanks, headers, or cooler connections

Installation Notes and Tips

Verify radiator dimensions, inlet and outlet sizes, and transmission cooler connection spacing before installation. This radiator is built for direct replacement use in the listed Chevrolet Silverado 1500 and GMC Sierra 1500 applications, including 2005 GMC Sierra 1500 without transmission oil cooler. Confirm all hose and cooler line routing matches the original setup before final assembly.

Quality Assurance

OSC tests the radiator core before assembly and retests the completed unit after assembly. Transmission and engine oil cooler circuits are checked prior to installation into the tank, and the finished radiator is pressure tested during production to help confirm leak resistance and proper function.