Spectra 2001-4608P Radiator

Spectra Heavy Duty Radiator Replacement

The Spectra 2001-4608P radiator is a heavy duty OE-style replacement built for cooling performance in demanding truck and commercial applications. It combines an aluminum core with plastic tanks and includes a plated transmission oil cooler to support engine and transmission temperature control.

Fits 2001-2004 Chevrolet Silverado 2500 HD, front; Fits 2001-2004 GMC Sierra 2500 HD, front.

• Aluminum core with plastic tank construction
• Crossflow design with upper left inlet and lower right outlet
• Core size: 40.5625 in. height, 34.1875 in. width, 1.875 in. thickness
• 2-row core layout for efficient heat transfer
• Transmission oil cooler included with plated cooler design
• Mounting hardware included
• 2.5 in. inlet and 2.5 in. outlet diameters
• Fan side transmission oil cooler location

Detailed Product Overview

Built to replace the original radiator in heavy duty cooling systems, Spectra 2001-4608P is engineered to meet or exceed OE performance targets for the radiator assembly and integrated transmission cooling circuit. The crossflow layout, 2-row core, and plated transmission oil cooler help manage heat in vehicles that work under load, tow, or operate in stop-and-go conditions. This radiator is a direct-fit style solution for Chevrolet Silverado 2500 HD and GMC Sierra 2500 HD applications listed in the fitment data.

This part cross-references AP Exhaust 8172 for the same application.

Common Cooling System Issues It Can Address

• Coolant temperature rise during towing or hauling
• Transmission fluid heat buildup from integrated cooler wear
• Leaks from aging radiator tanks or core seams
• Reduced cooling efficiency from clogged or damaged radiator passages
• Fitment problems caused by a deteriorated OE radiator assembly

Installation Notes and Tips

Verify inlet and outlet locations before installation: upper left inlet and lower right outlet. Confirm the 2.5 in. hose connections, transmission cooler line routing, and mounting points match the vehicle before removal of the original unit. Flush the cooling system and inspect hoses, clamps, and transmission cooler lines for wear before installing the new radiator. Use the included mounting hardware as needed during installation.

Quality Assurance

Spectra Premium states that its heavy duty radiators are manufactured with engineering, production, and quality control processes intended to meet or exceed the performance of the original equipment they replace. The 2001-4608P follows that OE-replacement approach for cooling system service on Chevrolet Silverado 2500 HD and GMC Sierra 2500 HD applications.