One Stop Solutions 2881 Radiator

Radiator for GM Minivans and Crossovers

Restore cooling performance with this OSC Premium New Automotive Radiator, part number 2881. Built for OES form and function, it is engineered for direct replacement use in select Chevrolet Uplander, Pontiac Montana, Buick Terraza, and Saturn Relay applications from 2006-2009.

• Fits 2006-2009 Chevrolet Uplander, N/A
• Fits 2006-2009 Pontiac Montana, N/A
• Fits 2006-2007 Buick Terraza, N/A
• Fits 2006-2007 Saturn Relay, N/A
• Premium aluminum core with plastic tanks
• Crossflow design with one-row core construction
• Transmission oil cooler included; engine oil cooler not included
• Cadmium-plated tubes help resist premature failure
• Die-cut gasket design supports leak resistance
• Individually pressure tested during production

Key Features

• Hassle-free installation with drop-in fit, form, and function
• Factory-style components fitted and torqued to specifications
• Enhanced fin density and core design for improved heat rejection
• Built with premium-grade tubes, fins, headers, and tanks
• Includes necessary fittings or hardware for the unit
• Transmission cooler uses a plated design with 10 13/16 in. fitting spacing
• Inlet and outlet diameters measure 1 5/16 in.
• Core dimensions: 30 7/16 in. height, 14 in. width, 1 in. thickness

Product Details

The OSC 2881 radiator is a direct-fit cooling replacement for vehicles that need OE-style packaging and dependable heat transfer. It uses a premium aluminum core with plastic tanks and a crossflow layout to match the original cooling system design. OSC also incorporates engineering updates such as added fins per inch and a thicker core to address heat load in higher-mileage vehicles. This part cross-references Spectra Premium CU2881 and Four Seasons 56561 for the same application.

Common Cooling Problems It Can Address

• Overheating caused by a restricted or leaking radiator
• Transmission fluid temperature concerns tied to a failing cooler circuit
• Coolant loss from tank, header, or gasket leakage
• Reduced cooling efficiency from damaged fins or internal tube wear
• Fitment issues after replacing a worn original radiator

Installation Notes

Verify radiator dimensions, inlet and outlet size, and transmission cooler connection spacing before installation. This radiator is designed for direct replacement in 2006-2009 Chevrolet Uplander and Pontiac Montana, plus 2006-2007 Buick Terraza and Saturn Relay applications. Confirm that your vehicle uses a crossflow radiator with a transmission oil cooler before ordering. Part number 2881 is supplied without a cap.

Quality Assurance

OSC tests the transmission and engine oil cooler circuits before tank assembly, checks the core before assembly, and tests the completed radiator again after assembly. Each unit is individually pressure tested to verify sealing and performance before release.