One Stop Solutions 2728 Radiator

Radiator for OE-Style Cooling Performance

The One Stop Solutions 2728 radiator is built for direct replacement service with OE form and function. It is engineered for the 2001-2007 Buick Rendezvous, Pontiac Aztek, Pontiac Montana, Oldsmobile Silhouette, Chevrolet Uplander, and Saturn Relay applications listed below, with a crossflow design and integrated transmission oil cooler.

Key Features

• Premium aluminum radiator construction with plastic tanks
• Crossflow design with 1-row core layout
• Transmission oil cooler included; engine oil cooler not included
• Core dimensions: 30 1/2 in. height, 14 7/8 in. width, 5/8 in. thickness
• Inlet and outlet diameters: 1 5/16 in.
• Die-cut gasket design for leak resistance
• Individually pressure tested during production
• Built for drop-in fit, form, and function

Detailed Description

Part number 2728 is an OSC Premium New Automotive Radiator from One Stop Solutions, designed around OE-style cooling requirements for vehicles that rely on a transmission cooler integrated into the radiator. The core uses premium-grade aluminum construction with cadmium-plated tubes inside and out to help resist premature failure, while the plastic tank design follows the original equipment layout. This radiator is engineered for the 2002-2007 Buick Rendezvous, 2001-2005 Pontiac Aztek, 2001-2005 Pontiac Montana, 2001-2004 Oldsmobile Silhouette, 2005-2006 Chevrolet Uplander, and 2005-2006 Saturn Relay, including heavy-duty and 1" core applications where listed.

This part cross-references Spectra Premium CU2562 and Four Seasons 56506 for the same application. The 2728 radiator is a practical OE-style replacement for drivers searching for a Buick Rendezvous radiator, Pontiac Aztek radiator, or Chevrolet Uplander radiator with integrated transmission cooling.

Common Problems This Radiator Can Address

• Coolant leaks from a cracked or aging radiator tank
• Overheating caused by restricted or weakened radiator flow
• Transmission temperature concerns when the cooler circuit is worn
• Reduced cooling efficiency from damaged fins or deteriorated core materials
• Fitment issues when replacing a factory radiator with the correct OE-style layout

Installation Notes and Tips

Verify core dimensions, inlet and outlet size, and transmission cooler line spacing before installation. This radiator uses a crossflow configuration and is listed with no engine oil cooler and no cap included. For best results, inspect hoses, clamps, and cooler lines during replacement and confirm the vehicle matches the listed year, make, model, and core note before installation.

Quality Assurance

OSC radiators are individually pressure tested during production, with the transmission and engine oil cooler circuits checked before assembly and the completed radiator tested again after assembly. The design also incorporates engineering updates aimed at improving durability and cooling performance in higher-mileage vehicles.

Compatible Vehicles

• Fits 2002-2007 Buick Rendezvous, N/A, 1" Core
• Fits 2005-2006 Chevrolet Uplander, N/A, 1" Core
• Fits 2005-2006 Saturn Relay, N/A, Heavy Duty
• Fits 2001-2005 Pontiac Aztek, N/A, 1" Core
• Fits 2001-2005 Pontiac Montana, N/A, 1" Core
• Fits 2001-2004 Oldsmobile Silhouette, N/A, 1" Core