Interior Fuse Box Location: 2000-2005 Buick LeSabre 2003 Click to view0:30The video above shows how to replace blown fuses in the interior fuse box of your 2003 Buick LeSabre in addition to the fuse panel diagram location.Author: David Hobbs Buick LeSabre - 2003 Fuse Box Diagram Buick; LeSabre - 2003 Fuse Box; The . alarm . can . be tested by following these steps: 1. From inside the vehicle, roll . down the driver’s . window . and . open .