One Stop Solutions 2565 Radiator

Brand One Stop Solutions 2565
Cap Included NO
Core Height 16 3/4
Core Material PA
Core Row Quantity 1
Core Thickness 1
Core Thickness 26
Core Width 25 7/8
Down Flow Or Cross Flow Type DOWNFLOW
Engine Oil Cooler Included NO
Engine Oil Cooler Type NONE
Inlet Diameter 1 3/8
Inlet Header Length 26 7/8
Inlet Header Width 2
Outlet Diameter 1 3/8
Outlet Header Length 26 7/8
Outlet Header Width 2
Tank Material PLASTIC
Transmission Oil Cooler Distance between Fittings 14 3/4
Transmission Oil Cooler Included YES
Transmission Oil Cooler Type PLATED
Fits Cadillac · 2 vehicles

O.E. form and function. Engineered as a direct-fit radiator with hassle-free installation.

Premium aluminum construction. Cadmium-plated tubes help resist premature failure and leaks.

Pressure tested. Each radiator is checked during production for dependable performance.

Cross-references Spectra Premium CU2565, 8012565 and 19259455 for the same application. See all 5.

$153.98Free shipping
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Radiator for 2003-2004 Cadillac CTS

Replace a worn or leaking cooling unit with this OSC Premium New Automotive Radiator, part number 2565. It is built for the 2003-2004 Cadillac CTS and follows OES form and function for a direct-fit cooling system repair.

  • Fits 2003-2004 Cadillac CTS, N/A
  • Premium-grade aluminum construction with plastic tanks
  • Downflow design with one-row core layout
  • Transmission oil cooler included with plated cooler type
  • Core dimensions: 16 3/4 in. height, 25 7/8 in. width, 1 in. thickness
  • 1 3/8 in. inlet and outlet diameters
  • Die-cut gasket design for leak resistance
  • Individually pressure tested during production

Product Details

OSC part number 2565 is engineered as a direct replacement radiator for the Cadillac CTS 2003-2004 application. The radiator uses premium aluminum tubes and fins with plastic tanks, and the tubes are cadmium plated inside and out to help resist premature failure. The unit is built to factory-style fitment and includes the transmission oil cooler where originally equipped. This radiator cross-references Spectra Premium CU2565 for the same application.

Common Cooling System Issues

  • Coolant leaks from a cracked tank, seam, or gasket area
  • Overheating caused by restricted coolant flow or reduced heat transfer
  • Transmission temperature concerns related to a failing cooler circuit
  • Fitment problems after replacing a damaged original radiator
  • Cooling performance loss on higher-mileage Cadillac CTS vehicles

Installation Notes

Verify inlet and outlet sizing, header dimensions, and cooler line spacing before installation. Transfer any required fittings or hardware from the original setup only if needed for your application. Confirm that the radiator matches the original downflow configuration and transmission cooler layout on your Cadillac CTS before final assembly.

Quality Assurance

Each OSC radiator is pressure tested during production, with cooler circuits checked before tank installation and the completed assembly tested again. The design also incorporates engineering updates such as improved fin density and enhanced cooling capacity to address common failure points in higher-mileage vehicles. Part number 2565 is built to meet original-equipment-style cooling requirements for the listed Cadillac CTS fitment.

This part fits 2 vehicles
Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
YearMakeModelLitersCylindersPositionNotes
2004CadillacCTS3.2LV6N/A—
2003CadillacCTS3.2LV6N/A—
Directly replaces or cross-references 5 part numbers
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.
Spectra Premium — CU2565801256519259455A2565GM3010412