Spectra CU2733 Radiator

Spectra CU2733 Radiator Overview

The Spectra CU2733 radiator is a direct-fit cooling system replacement for select Cadillac applications. Built to meet OE-level durability expectations, it supports consistent engine cooling for the 2004-2007 Cadillac SRX and 2005-2009 Cadillac STS.

Compatible with Cadillac SRX and Cadillac STS applications that match the listed configuration, this radiator is a practical choice when replacing a leaking, clogged, or damaged factory unit. The Spectra Premium CU2733 is engineered for the same service demands expected from original equipment.

Key Features

• Radiator replacement for select Cadillac SRX and Cadillac STS models
• OE-style construction focused on durability and fitment
• Supports stable coolant flow and heat transfer
• Fits 2005-2009 Cadillac STS, w/o Internal Transmission Oil Cooler; w/o Heater Return Line
• Fits 2004-2007 Cadillac SRX, w/o Towing Package; w/o internal TOC (Transmission Oil Cooler); w/o Heater Return Line
• Part number CU2733 for catalog and cross-reference lookup

Detailed Description

Spectra Premium designed the CU2733 radiator to match the durability expectations of OE cooling components while serving as a replacement for the factory radiator on specific Cadillac vehicles. It is listed for 2004-2007 Cadillac SRX and 2005-2009 Cadillac STS configurations without the internal transmission oil cooler and without the heater return line, and the SRX application also excludes the towing package. This makes the CU2733 a fitment-specific radiator for owners replacing a worn cooling core on these Cadillac models.

This part cross-references APDI 8012733 for the same application. The CU2733 part number is also commonly used when searching for a replacement radiator for Cadillac SRX and Cadillac STS cooling system service.

What It Helps Address

• Coolant leaks from a damaged or corroded radiator
• Overheating caused by restricted coolant flow
• Reduced cooling efficiency from an aging radiator core
• Physical damage to the original Cadillac SRX or Cadillac STS radiator
• Cooling system service needs during radiator replacement

Installation Notes and Tips

Verify vehicle configuration before ordering. The CU2733 fits 2005-2009 Cadillac STS, w/o Internal Transmission Oil Cooler; w/o Heater Return Line, and fits 2004-2007 Cadillac SRX, w/o Towing Package; w/o internal TOC (Transmission Oil Cooler); w/o Heater Return Line. Confirm hose routing, cooler connections, and heater return line requirements against the original radiator before installation.

After installation, refill the cooling system with the correct coolant, bleed trapped air, and inspect for leaks at all hose and connection points. Matching the radiator to the exact Cadillac SRX or Cadillac STS configuration helps ensure proper fit and cooling performance.

Quality Assurance

Spectra Premium radiators are built to meet OE-style durability expectations for long-term cooling system service. The CU2733 is a cataloged replacement radiator for select Cadillac applications and is supported by established aftermarket interchange references, including APDI 8012733.