Please check notes in each part listing to ensure the Dimmer Switch is correct for your 1938 CADILLAC SERIES 75 with a 5.7L 346 engine. Special restrictions like "California only" or "with sport package" may indicate a Dimmer Switch fits only certain 1938 CADILLAC SERIES 75 models.
Clicking a "More Info" link will display a picture and/or other details about that Dimmer Switch in a separate window (you may need to turn off your pop-up-blocking software for this to work).
After choosing a Dimmer Switch, 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 "Find More Parts" to find more Electrical-Switch & Relay parts, other CADILLAC SERIES 75 parts or parts for a different vehicle. Please try our Interactive Catalog (click link above) for faster searching. Both catalogs use the same shopping cart so any auto parts you've already chosen for your 1938 CADILLAC will not be lost if you switch.