Keep engine temperatures under control with the Spectra Premium Radiator CU921. A radiator routes hot engine coolant through its core, where airflow draws the heat away before the cooled coolant returns to the engine. This unit drops in as a direct-fit replacement for a range of late-1980s through mid-1990s full-size Buick, Oldsmobile, and Pontiac models — including the Buick Riviera, LeSabre, and Reatta, the Oldsmobile Toronado and 98, and the Pontiac Bonneville. See the Buyer's Guide tab for the full list of covered years and models.
- Core cooling function: transfers heat from the circulating coolant to the passing air to help maintain normal operating temperature.
- Direct-fit replacement: designed to replace the radiator on the listed applications.
- Restores cooling capacity: if a leaking, clogged, or corroded original radiator is the cause of overheating, this replaces it.
Signs the original radiator may need replacing: visible coolant leaks or puddles, rising coolant temperature or overheating, and internal corrosion or clogging that reduces heat transfer. Diagnose the cause of any overheating before replacing.
Manufacturer part number CU921.
Frequently Asked Questions
What does this radiator do?
It routes hot engine coolant through its core, where passing air pulls the heat away so the cooled coolant can return to the engine and help maintain normal operating temperature.
Which vehicles does the CU921 fit?
It is a direct-fit replacement for various late-1980s to mid-1990s Buick, Oldsmobile, and Pontiac full-size models. Check the Buyer's Guide tab to confirm your exact year and model.
What are the signs my radiator needs replacing?
Common signs include coolant leaks or puddles, rising coolant temperature or overheating, and internal corrosion or clogging. Diagnose the cause before replacing.
Will this fit my 1993 Buick LeSabre?
Yes, the 1993 Buick LeSabre is among the listed applications, along with 1988-1991 LeSabre models. Verify your specific vehicle in the Buyer's Guide tab.
Is this a complete cooling system fix?
No. It replaces the radiator only. If overheating has other causes, additional parts such as hoses, a thermostat, or the water pump may also need service.
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