One Stop Solutions 2948 Radiator

Radiator Overview

OSC Premium radiator part number 2948 is built to OES form and function for heavy-duty cooling system replacement. It is engineered for multi-fit applications while maintaining the look and fit expected in a direct replacement radiator.

This radiator fits 2003-2006 Chevrolet Avalanche 2500, 2003-2006 Chevrolet Silverado 2500 HD, 2003-2006 Chevrolet Silverado 3500, 2003-2006 Chevrolet Suburban 2500, 2003-2006 GMC Sierra 2500 HD, 2003-2006 GMC Sierra 3500, and 2003-2006 GMC Yukon XL 2500, all without Allison transmission.

Key Features

• Premium aluminum construction with plastic tanks for OE-style cooling system service.
• Crossflow design with a 2-row core for efficient heat transfer.
• Plated engine and transmission oil cooler circuits for added durability.
• Die-cut gasket design helps maintain a leak-resistant seal.
• Individually pressure tested during production for quality control.
• Part number 2948 is engineered for drop-in fit, form, and function.

Detailed Description

OSC part number 2948 is a replacement radiator designed around original-equipment dimensions and cooling performance. The core uses premium-grade aluminum, while the integrated oil cooler sections are plated to help resist premature failure. With a crossflow layout, 2-row core construction, and factory-style fittings, this radiator supports reliable cooling system restoration on Chevrolet Silverado 2500 HD, Chevrolet Silverado 3500, and related GM truck and SUV applications.

The radiator is built with a die-cut gasket and is pressure tested during production to verify sealing and assembly integrity. OSC also states that the design includes enhancements such as increased fin density and larger cooler capacity where needed to address heat load in higher-mileage vehicles. Part number 2948 cross-references APDI 8012948 and Spectra Premium CU2948 for the same application.

What It Is Used For

• Replacing a leaking or damaged radiator.
• Restoring proper coolant flow and heat rejection.
• Addressing transmission oil cooler or engine oil cooler service needs.
• Correcting cooling performance loss from worn internal radiator components.
• Supporting repair on GM trucks and SUVs with OE-style cooling layouts.

Installation Notes and Tips

Verify radiator dimensions, inlet and outlet sizes, and cooler line spacing before installation. This unit is configured for applications without Allison transmission, so confirm vehicle equipment before ordering. The radiator includes the necessary fittings or hardware as stated by the manufacturer. Part number 2948 is a direct-fit style replacement, so installation should follow factory cooling system service procedures.

Quality Assurance

OSC states that each radiator is individually pressure tested and built to OES form and function. The manufacturer also notes that the unit is tested during multiple stages of production to verify the engine and transmission cooler circuits and the completed assembly.