Denso 221-9013 Radiator

Denso 221-9013 Radiator Overview

The Denso 221-9013 radiator is built for direct replacement cooling performance in select Buick, Chevrolet, and Pontiac applications. It uses OE-style dimensions and materials to support proper engine temperature control, with an integrated transmission oil cooler included for vehicles that require it.

Compatible With 2004-2009 Buick LaCrosse, 2004-2005 Chevrolet Impala, 2004-2005 Chevrolet Monte Carlo, and 2004-2008 Pontiac Grand Prix applications, this radiator is a fitment-focused replacement for common GM cooling system service needs.

Key Features

• Core height: 14.1730
• Core width: 30.3540
• Core thickness: 0.6290
• Inlet diameter: 1.3130
• Outlet diameter: 1.3130
• Transmission oil cooler included
• OE-based radiator configuration for fitment accuracy

Detailed Description

Denso 221-9013 is a radiator replacement engineered around OE specifications for cooling system reliability and proper fitment. The core dimensions, tank configuration, fin pitch, and materials are selected to match the requirements of the listed Buick LaCrosse, Chevrolet Impala, Chevrolet Monte Carlo, and Pontiac Grand Prix applications. For drivers searching for a radiator for 2005-2009 Buick LaCrosse or a radiator for 2004-2005 Chevrolet Impala, this part number provides a direct-service solution with the transmission oil cooler already included.

This part cross-references ACDelco 21556 for the same application.

What It Helps Address

• Engine overheating caused by a worn or leaking radiator
• Coolant loss from cracked tanks or damaged core passages
• Transmission cooling concerns in vehicles that route fluid through the radiator
• Reduced cooling efficiency from age-related corrosion or clogging
• Fitment issues when replacing an OE-style GM radiator

Installation Notes and Tips

Verify inlet and outlet diameter match the original unit before installation. Confirm the vehicle uses the radiator configuration with an integrated transmission oil cooler, and inspect hoses, clamps, and coolant condition during replacement. Proper system bleeding and a pressure check after installation help confirm a secure repair.

Quality Assurance

Denso supplies radiators to OE car makers worldwide, and its radiator designs are built to meet manufacturer standards for dimensions, materials, and function. Each radiator is subjected to durability and performance testing to support dependable cooling under demanding operating conditions.