Koyorad A2855 Radiator

Koyorad A2855 Radiator Overview

The Koyorad A2855 radiator is an OE-equivalent replacement built for direct cooling system service on select Chevrolet, GMC, and Hummer applications. It combines an aluminum core with plastic tanks and includes an internal transmission oil cooler for vehicles that use integrated fluid cooling.

Koyorad Radiator products are developed with the technical experience needed to deliver a replacement that matches factory-style fitment and cooling function. This A2855 radiator is a practical choice for drivers servicing a 2009-2012 Chevrolet Colorado, 2009-2012 GMC Canyon, 2006-2010 Hummer H3, or 2009-2010 Hummer H3T.

Key Features

• Part number: A2855
• OE-equivalent radiator replacement from Koyorad
• Aluminum core with single-row construction
• Plastic tank design
• Core dimensions: 18.5 in. height, 23.75 in. width, 1.0625 in. thickness
• Inlet diameter: 1.3125 in.; outlet diameter: 1.5625 in.
• Internal transmission oil cooler included
• Transmission oil cooler plate quantity: 5
• Transmission oil cooler diameter: 1.625 in.

Product Details

The Koyorad A2855 radiator is built for vehicles that require a radiator with an integrated transmission oil cooler. Its aluminum core supports efficient heat transfer, while the plastic tank construction follows common OE-style radiator design. For owners searching for a radiator for 2009-2012 Chevrolet Colorado, 2009-2012 GMC Canyon, or Hummer H3 and H3T cooling system repair, this part number provides a direct replacement option with the listed core and hose connection dimensions.

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

Common Problems This Part Can Address

• Coolant leaks from a damaged or aging radiator
• Overheating caused by restricted or inefficient heat exchange
• Transmission fluid temperature issues in vehicles with an integrated cooler
• Cracked or deteriorated plastic tank seams
• Cooling system service needs after corrosion or impact damage

Installation Notes

Verify radiator dimensions, inlet and outlet sizes, and transmission cooler connections before installation. Drain the cooling system, transfer any required fittings or sensors from the original unit if applicable, and inspect hoses, clamps, and coolant condition during replacement. After installation, refill with the correct coolant and bleed the system according to the vehicle service procedure.

Quality Assurance

Koyorad manufactures OE-equivalent radiators using application-specific engineering and replacement-focused construction. The A2855 is built to match the cooling requirements of the listed Chevrolet, GMC, and Hummer applications while supporting factory-style fitment and function.