Onix OR1889 Radiator

Radiator for Select GM Applications

The Onix OR1889 radiator is a direct-fit cooling replacement for select Pontiac, Buick, and Oldsmobile vehicles. It is built for applications that use a 5/8-inch thick core and is intended to restore proper engine cooling performance in compatible GM platforms.

Key Features

• Direct-fit radiator for select GM vehicles
• 5/8-inch thick core application
• Engineered with premium components for longer service life
• Part number: OR1889
• Compatible with Pontiac Grand Prix, Buick Regal, and Oldsmobile Silhouette applications

Detailed Description

Onix OR1889 is a replacement radiator designed for vehicles that require the specified core thickness and OE-style fitment. Onix positions this radiator line as a value-focused, drop-in-fit solution with upgraded component quality for dependable cooling performance. This part number, OR1889, is a practical choice for drivers servicing a Pontiac Grand Prix, Buick Century, Buick Regal, Oldsmobile Intrigue, Oldsmobile Silhouette, Pontiac Montana, or Pontiac Trans Sport within the listed model years.

This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.

What It Helps Address

• Overheating caused by a worn or leaking radiator
• Reduced cooling efficiency from age-related core deterioration
• Coolant loss from cracked or corroded radiator tanks
• Temperature instability in stop-and-go driving
• Cooling system service needs on high-mileage GM vehicles

Installation Notes and Tips

Verify the vehicle uses a 5/8-inch thick core before ordering. Confirm radiator dimensions, hose locations, and mounting points against the original unit, especially on Pontiac Grand Prix, Buick Regal, and Oldsmobile Silhouette applications. Flush the cooling system and inspect hoses, clamps, thermostat, and coolant condition during replacement.

Quality Assurance

Onix designs its radiator line with upgraded components and a drop-in-fit approach to support consistent performance and service life in value-priced replacement applications.