Please check notes in each part listing to ensure the Radiator Cap is correct for your 1966 CHEVROLET SUBURBAN with a 4.1L 250 engine. GATES & ACDELCO are competing brands, and each brand's Radiator Cap may be interchangeable. Special restrictions like "California only" or "with sport package" may indicate a Radiator Cap fits only certain 1966 CHEVROLET SUBURBAN models.

Clicking a "More Info" link will display a picture and/or other details about that Radiator Cap in a separate window (you may need to turn off your pop-up-blocking software for this to work).

After choosing a Radiator Cap, click the "Add Part" button. Shipping costs will be shown on the Shopping Cart page. You may use your browser's Back button, or click on "Find More Parts", to find more Cooling System parts, other CHEVROLET SUBURBAN parts, or parts for a different vehicle. Please try our Interactive Catalog (click red Start button above) for faster searching. Both catalogs use the same shopping cart, so any auto parts you've already chosen for your 1966 CHEVROLET will not be lost if you switch.