Spectra Premium radiator for Chevrolet Silverado GMC Cadillac - 34-1/16" core, direct-fit with TOC

Spectra Premium CU2423 is a direct-replacement radiator with a 34-1/16" core engineered to restore cooling performance for compatible Chevrolet Silverado, GMC and Cadillac models.

This radiator is built to match original-equipment specifications so your vehicle’s engine and transmission cooling systems perform reliably without modification. Manufactured with high-density multi-louvered fins, precision header dimensions and a drop-in installation design, the CU2423 aims to combine proven durability with straightforward fitment. The unit comes without the external oil cooler (EOC) but includes a transmission oil cooler (TOC) when applicable; inlet and outlet header dimensions are 18-7/16 x 3-1/8 inches to mirror OE plumbing and mounting points.

How does the CU2423 restore my truck’s cooling capacity?

The CU2423 uses a high-density fin pack and core size matched to the original radiator to maximize heat transfer and help the engine stay within designed temperature ranges. Its multi-louvered fins increase surface area for airflow, which improves thermal exchange under load and in stop-and-go traffic. Replacement of a failing radiator with this unit returns the system to intended performance without custom modifications.

• 34-1/16" core size for comparable cooling surface area
• High-density multi-louvered fins for improved heat transfer
• Precision-matched inlet/outlet header dimensions for plumbing compatibility

Will this radiator fit my Chevrolet, GMC, or Cadillac without changes?

Yes — the CU2423 is manufactured to OE fit, form and function, which means it is intended to drop into the same mounting points and connect to existing hoses and fittings. No cutting, drilling or additional brackets should be necessary when you select the correct confirmed fitment for your exact model and year. Always verify fit using vehicle fitment tools before purchase.

• Direct replacement design using OE mounting locations
• Included accessory pack to simplify installation
• Confirm vehicle compatibility with the fitment tool before ordering

What installation details should I know before replacing my radiator?

Installation is designed to be straightforward thanks to the drop-in fit and accessory kit, but basic mechanical skills and proper tools are recommended. Drain the cooling system and transmission fluid if necessary, disconnect hoses and sensors carefully, and follow torque specifications for mounting hardware. Inspect hoses, clamps and the cooling fan assembly while performing the swap to avoid repeat service soon after installation.

• Comes with accessory pack for typical replacements
• Requires draining coolant and possibly transmission fluid (if TOC connected)
• Inspect surrounding hoses, clamps and fan shroud during installation

How durable and reliable is this Spectra Premium radiator?

Spectra Premium employs manufacturing quality controls and materials intended to match or exceed OEM lifespan expectations. The CU2423 undergoes testing for durability and thermal performance to handle varied operating conditions. While lifetime depends on service and environment, the design aims to resist leaks and maintain structural integrity over extended service intervals.

• Engineered and tested to meet OE performance standards
• High-quality materials and precision header construction
• Designed for reliable operation under diverse weather conditions

Who is this for: The Spectra Premium CU2423 radiator is aimed at owners and technicians working on compatible Chevrolet Silverado, GMC or Cadillac trucks who need a dependable, direct-fit replacement with OE-style performance. It’s ideal for fleets, DIY mechanics and shops seeking an off-the-shelf radiator that restores cooling efficiency without custom work. Before purchasing, confirm your vehicle’s year, engine and transmission configuration to ensure the CU2423 matches your application.