Koyorad A2458 Radiator

Koyorad A2458 Radiator for GM SUVs

The Koyorad A2458 radiator is an OE-equivalent replacement built for select GM and Saab SUVs with automatic transmission cooling. It combines an aluminum core with plastic tanks to match common factory-style radiator construction while supporting dependable engine cooling and transmission fluid temperature control.

Compatible with 2002-2009 Chevrolet Trailblazer, 2002-2009 GMC Envoy, 2005-2009 Saab 9-7x, 2003-2008 Isuzu Ascender, 2004-2007 Buick Rainier, 2002-2006 Chevrolet Trailblazer EXT, 2002-2006 GMC Envoy XL, 2004-2005 GMC Envoy XUV, and 2002-2004 Oldsmobile Bravada.

Key Features

• OE-equivalent replacement radiator from Koyorad
• Aluminum core with plastic tank construction
• Single-row core design
• Internal transmission oil cooler included
• Transmission oil cooler plate design with 4 plates
• Core dimensions: 27.6875 in. wide, 18.125 in. high, 1.0625 in. thick
• Inlet diameter: 1.5625 in.; outlet diameter: 1.3125 in.

Product Details

Koyorad Radiator A2458 is built for drivers replacing a leaking, clogged, or damaged radiator in GM platform SUVs and the Saab 9-7x. The radiator uses an aluminum core for heat transfer efficiency and plastic end tanks for a factory-style fit. With an integrated transmission oil cooler, it supports both engine coolant circulation and automatic transmission fluid cooling in one assembly. Koyorad’s radiator line focuses on OE-equivalent replacements backed by manufacturing experience and application-specific engineering.

This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.

Common Problems This Radiator Can Address

• Coolant leaks from a cracked or corroded radiator
• Overheating caused by restricted coolant flow
• Transmission fluid temperature issues related to a failed cooler circuit
• Damaged inlet or outlet connections
• Reduced cooling performance from an aging factory radiator

Installation Notes and Tips

Verify radiator dimensions, inlet and outlet sizes, and transmission cooler connections before installation. Flush the cooling system, inspect hoses and clamps, and confirm the transmission cooler lines are clean and properly routed. After installation, refill with the correct coolant mixture, bleed air from the system, and check for leaks at all hose and cooler connections.

Quality Assurance

Koyorad manufactures OE-equivalent radiators using application-specific design and cooling-system experience to support proper fit and function for the listed vehicles.