Denso 221-9429 Radiator

Denso 221-9429 Radiator for Heavy-Duty Cooling

The Denso 221-9429 radiator is built for 2011-2016 Chevrolet Silverado 2500 HD and Silverado 3500 HD, as well as 2011-2016 GMC Sierra 2500 HD and Sierra 3500 HD applications. It combines OE-style fitment with cooling-system dimensions and materials engineered to meet strict manufacturer standards.

Key Features

• Core height: 33.4646 in.
• Core width: 28.4882 in.
• Core thickness: 1.8898 in.
• Transmission oil cooler included
• Inlet diameter: 1.8125 in.
• Outlet diameter: 2.0625 in.
• OE-focused radiator configuration for proper fit and cooling performance

Detailed Description

Denso part number 221-9429 is a radiator assembly engineered for heavy-duty truck cooling demands. Denso supplies radiators to OE vehicle manufacturers worldwide, and this radiator reflects that experience through its core dimensions, tank design, fin pitch, and material selection. For Silverado 2500 HD, Silverado 3500 HD, Sierra 2500 HD, and Sierra 3500 HD models, the radiator is built to support consistent engine temperature control and dependable heat exchange under demanding operating conditions.

This radiator cross-references Spectra Premium CU13244 for the same application.

What This Radiator Helps Address

• Overheating caused by reduced radiator efficiency
• Coolant temperature instability during towing or heavy load use
• Transmission heat management when the integrated cooler is required
• Leaks or corrosion in an aging radiator assembly
• Poor fitment from non-OE-style replacement parts

Installation Notes and Tips

Verify core dimensions, inlet and outlet sizes, and transmission cooler connections before installation. Confirm vehicle application by year, make, and model: Fits 2011-2016 Chevrolet Silverado 2500 HD, N/A; Fits 2011-2016 Chevrolet Silverado 3500 HD, N/A; Fits 2011-2016 GMC Sierra 2500 HD, N/A; Fits 2011-2016 GMC Sierra 3500 HD, N/A. Flush the cooling system, inspect hoses and clamps, and check for proper coolant level after installation. Part number 221-9429 should be matched to the vehicle’s cooling-system configuration before final assembly.

Quality Assurance

Denso radiators are built from OE experience and undergo durability and function testing before release. That process supports reliable performance, fitment accuracy, and consistent cooling performance for Chevrolet Silverado and GMC Sierra heavy-duty applications.