Koyorad A2563 Radiator

Koyorad A2563 Radiator for GM SUV Applications

The Koyorad A2563 radiator is an OE-equivalent replacement built for select Chevrolet, GMC, Buick, Saab, and Isuzu SUVs. It features an aluminum core with plastic tanks and an integrated transmission oil cooler for direct replacement service on supported vehicles.

Key Features

• Aluminum core with plastic tank construction
• Single-row core design
• Core dimensions: 18.125 in. height, 27.6875 in. width, 1.0625 in. thickness
• Inlet diameter: 1.3125 in.; outlet diameter: 1.5625 in.
• Internal transmission oil cooler included
• Transmission oil cooler diameter: 1.625 in. with 4 plate quantity
• OE-equivalent replacement from Koyorad Radiator

Product Details

Koyorad Radiator A2563 is engineered as a direct-fit radiator replacement for vehicles that use an integrated transmission cooler. Koyorad applies its OE replacement manufacturing experience to deliver a radiator that matches the required cooling layout for supported platforms, including the Chevrolet Trailblazer, GMC Envoy, Buick Rainier, Saab 9-7x, Isuzu Ascender, and related extended-wheelbase variants. This part number, A2563, is built for applications where radiator performance and transmission fluid cooling are both part of the factory system.

Compatible With: 2006-2009 Chevrolet Trailblazer; 2005-2009 GMC Envoy; 2005-2009 Saab 9-7x; 2004-2007 Buick Rainier; 2003-2006 Chevrolet Trailblazer EXT; 2003-2006 GMC Envoy XL; 2003-2006 Isuzu Ascender; 2004-2005 GMC Envoy XUV. This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.

Common Replacement Reasons

• Coolant leaks from a damaged radiator core or tank
• Transmission fluid cooler failure inside the radiator
• Overheating caused by restricted coolant flow
• Cracked plastic end tanks or aged sealing surfaces
• Reduced cooling efficiency in high-mileage GM SUV platforms

Installation Notes

Verify inlet and outlet hose sizes, transmission cooler line routing, and mounting points before installation. Flush the cooling system and inspect hoses, clamps, and the thermostat when replacing the radiator. Because this radiator includes an internal transmission oil cooler, confirm the vehicle’s factory cooler configuration matches the replacement part before installation. Koyorad A2563 is listed for N/A position applications.

Quality Assurance

Koyorad manufactures OE-equivalent radiators using application-specific engineering and cooling-system know-how. The A2563 is built to meet the requirements of the listed Chevrolet Trailblazer, GMC Envoy, Buick Rainier, Saab 9-7x, and related models for direct replacement service.