Denso 221-9119 Radiator

Denso 221-9119 Radiator for Lucerne and DTS

The Denso 221-9119 radiator is built for direct replacement in select Buick Lucerne and Cadillac DTS applications. It combines OE-style fitment with core dimensions, tank design, and materials engineered to meet original manufacturer standards for dependable engine cooling.

Key Features

• OE-style radiator construction from Denso, a supplier to original equipment vehicle manufacturers
• Core height: 15.0787 in., core width: 30.5512 in., core thickness: 1.2598 in.
• Inlet diameter: 1.3228 in.; outlet diameter: 1.5748 in.
• Transmission oil cooler included for integrated cooling support
• Built and tested to meet strict durability and function requirements
• Direct-fit replacement for 2006-2011 Buick Lucerne and 2006-2011 Cadillac DTS

Detailed Description

Denso Part Number 221-9119 is a radiator engineered for consistent heat transfer and stable engine temperature control. Its OE-matched configuration helps maintain proper cooling performance in demanding driving conditions, while the integrated transmission oil cooler supports vehicles that rely on combined thermal management. This radiator is a strong fit for drivers searching for a 2006-2011 Buick Lucerne radiator or a 2006-2011 Cadillac DTS radiator with factory-style dimensions and connection sizes.

This part cross-references ACDelco 21615 for the same application.

What This Radiator Helps Address

• Overheating caused by a leaking or restricted radiator
• Coolant loss from cracked tanks or damaged core passages
• Temperature instability during stop-and-go or highway driving
• Transmission heat management concerns when the factory cooler is part of the system
• Fitment issues from using a radiator that does not match OE dimensions

Installation Notes and Tips

Verify core size, inlet and outlet diameters, and transmission cooler connections before installation. Flush the cooling system, inspect hoses and clamps, and confirm the replacement matches the vehicle’s original radiator layout. For best results, refill with the correct coolant type and bleed air from the system according to factory service procedures.

Quality Assurance

Denso radiators are produced using OE experience and undergo durability and function testing to support reliable performance. The 221-9119 is built to meet original manufacturer standards for fitment and cooling consistency.