Global Parts 2855C Radiator

Radiator for Hummer H3 and H3T

Global Parts 2855C is a direct-fit radiator built for cooling-system replacement on select Hummer, Chevrolet, and GMC applications. It uses an aluminum core with plastic tanks and includes an integrated transmission oil cooler for vehicles that route automatic transmission fluid through the radiator.

Fits 2006-2011 Hummer H3, 2009-2010 Hummer H3T, 2009-2012 Chevrolet Colorado, and 2009-2012 GMC Canyon in the listed configurations. Global Parts 2855C is a practical OE-style replacement when the original radiator is leaking, restricted, or no longer maintaining proper operating temperature.

Key Features

• Part number: 2855C
• Aluminum core with plastic tank construction
• Down-flow radiator design
• Core thickness: 1 in. (25.4 mm)
• Inlet diameter: 1.25 in. (31.75 mm)
• Outlet diameter: 1.5 in. (38.1 mm)
• Transmission oil cooler included with quick-connect fittings
• Transmission oil cooler fitting distance: 12.01 in.
• Core fin quantity: 68 every 4 in.

Detailed Description

The Global Parts 2855C radiator is engineered to remove heat from engine coolant and maintain stable operating temperatures in the vehicle’s cooling system. Its aluminum core supports efficient heat transfer, while the plastic tank design matches common OE radiator construction. The built-in transmission oil cooler adds fluid cooling support for automatic-transmission applications that use the radiator as part of the thermal management system.

This radiator fits 2006-2011 Hummer H3, 2009-2010 Hummer H3T, 2009-2012 Chevrolet Colorado, and 2009-2012 GMC Canyon, including off-road package applications where listed. If you are replacing a leaking radiator, addressing overheating, or restoring cooling performance after core or tank failure, Global Parts 2855C provides the correct fitment profile for these vehicles.

This part cross-references UAC RA2855C for the same application.

What This Radiator Helps Address

• Coolant leaks from a cracked tank or damaged core
• Engine overheating caused by reduced heat dissipation
• Transmission fluid temperature concerns in radiator-cooled systems
• Restricted coolant flow from internal radiator deterioration
• Cooling-system replacement needs on Hummer H3, H3T, Chevrolet Colorado, and GMC Canyon models

Installation Notes and Tips

Verify inlet and outlet hose sizes, transmission cooler connection style, and radiator dimensions before installation. Inspect hoses, clamps, and coolant condition during replacement, and confirm the cooling fan, thermostat, and pressure cap are in proper working order. Flush the system if contamination or debris is present before installing the new radiator.

Quality Assurance

Global Parts supplies replacement cooling components for OE-style service applications. Part number 2855C is built to match the listed fitment and cooling-system configuration for the vehicles shown above.