Koyorad A2370 Radiator

Koyorad A2370 Radiator Overview

The Koyorad A2370 radiator is an OE-equivalent replacement built for GM truck and SUV cooling systems that need dependable heat transfer and integrated fluid cooling. It is a direct-fit radiator for applications such as Chevrolet Silverado, GMC Sierra, Cadillac Escalade, and Hummer H2 platforms.

With an aluminum core, plastic tanks, and built-in engine and transmission oil cooler circuits, this radiator is designed to match the factory-style layout used on many full-size GM applications. The Koyorad A2370 helps restore cooling performance while keeping the original equipment configuration in place.

Key Features

• Aluminum core with 1-row construction for efficient heat dissipation
• Plastic tank design for OE-style fit and function
• Integrated engine oil cooler included
• Integrated transmission oil cooler included
• Core dimensions: 34 in. height, 18.5 in. width, 1.0625 in. thickness
• Inlet diameter: 1.3125 in.; outlet diameter: 1.5625 in.
• Engine oil cooler uses a 6-plate design
• Transmission oil cooler diameter: 1.625 in.

Product Details

Koyorad Radiator A2370 is engineered as an OE-style replacement radiator for a wide range of GM V8 truck and SUV applications. Koyorad focuses on replacement radiators that follow factory specifications closely, and this unit reflects that approach with aluminum core construction, molded plastic tanks, and internal cooling passages for both engine oil and transmission fluid. The result is a radiator assembly suited to restoring factory cooling system layout on vehicles such as the Chevrolet Silverado 1500, Silverado 2500 HD, GMC Sierra 1500, Sierra 2500 HD, Cadillac Escalade, and Hummer H2.

This part number, A2370, is a practical choice when the original radiator shows signs of leakage, reduced cooling efficiency, or cooler circuit wear. This part cross-references Denso (e.g., 221-0508) for the same application.

Common Problems This Radiator Can Address

• Coolant leaks from a cracked or aging radiator tank
• Overheating caused by restricted or inefficient heat exchange
• Transmission temperature issues related to a failing cooler circuit
• Engine oil cooler leakage or reduced cooler performance
• Factory radiator replacement needs on GM truck and SUV cooling systems

Installation Notes and Tips

Verify inlet and outlet hose sizes, cooler line connections, and core dimensions before installation. Because the A2370 includes internal engine oil and transmission oil cooler sections, inspect all related lines and fittings for wear, contamination, or damage before reassembly. Flush the cooling system as needed, refill with the correct coolant, and bleed air from the system according to the vehicle service procedure. Confirm fan shroud, mounting points, and surrounding components clear the radiator before final tightening.

Quality Assurance

Koyorad states that its radiators are built as OE-equivalent replacements using technical manufacturing experience aimed at getting the repair done correctly the first time. The A2370 follows that OE-style replacement approach for consistent fitment and cooling-system restoration.

Compatible Vehicles

• Fits 2002-2014 Cadillac Escalade, N/A
• Fits 2003-2014 Cadillac Escalade ESV, N/A; 27mm Core; Koyorad Radiator
• Fits 2007-2013 Cadillac Escalade EXT, N/A; 27mm Core; Koyorad Radiator
• Fits 2006-2013 Chevrolet Suburban 1500, N/A
• Fits 2000-2013 Chevrolet Suburban 2500, N/A; 27mm Core; Koyorad Radiator
• Fits 2003-2009 Chevrolet Silverado 1500, N/A
• Fits 2001-2009 Chevrolet Silverado 2500 HD, N/A; 27mm Core; Koyorad Radiator
• Fits 2008-2009 Chevrolet Silverado 3500, N/A; 27mm Core; Koyorad Radiator
• Fits 2001-2006 Chevrolet Silverado 3500, N/A; 27mm Core; Koyorad Radiator
• Fits 2007-2009 Chevrolet Silverado 3500 HD, N/A; 27mm Core; Koyorad Radiator
• Fits 2001-2009 GMC Yukon XL 1500, N/A; 27mm Core; Koyorad Radiator
• Fits 2001-2003 GMC Sierra 1500 HD, N/A; 27mm Core; Koyorad Radiator
• Fits 2001-2006 GMC Sierra 2500 HD, N/A; 27mm Core; Koyorad Radiator
• Fits 2001-2006 GMC Sierra 3500, N/A; 27mm Core; Koyorad Radiator
• Fits 1999-2006 Chevrolet Silverado 2500, N/A; 27mm Core; Koyorad Radiator
• Fits 1999-2004 GMC Sierra 2500, N/A; 27mm Core; Koyorad Radiator
• Fits 2003-2007 Hummer H2, N/A
• Fits 2002-2006 Cadillac Escalade EXT, N/A
• Fits 2005-2006 Chevrolet Silverado 1500 HD, N/A; 27mm Core; Koyorad Radiator
• Fits 2001-2003 Chevrolet Silverado 1500 HD, N/A; 27mm Core; Koyorad Radiator
• Fits 2001-2006 GMC Sierra 1500, N/A
• Fits 2005-2006 GMC Sierra 1500 HD, N/A; 27mm Core; Koyorad Radiator
• Fits 2002-2004 Chevrolet Avalanche 1500, N/A
• Fits 2007-2008 GMC Yukon, N/A
• Fits 2007 Chevrolet Silverado 1500 Classic, N/A; 27mm Core; Koyorad Radiator
• Fits 2007 Chevrolet Silverado 1500 HD Classic, N/A; 27mm Core; Koyorad Radiator
• Fits 2007 Chevrolet Silverado 2500 HD Classic, N/A; 27mm Core; Koyorad Radiator
• Fits 2007 Chevrolet Silverado 3500 Classic, N/A; 27mm Core; Koyorad Radiator
• Fits 2008 Chevrolet Avalanche, N/A