Probably a fuse, check to see if your horn works, really!
check the fuse for dash lights
There are several things that can cause your 2000 Cadillac dashboard lights to quit working. The most common cause is a blown fuse.
Check parking/tailight fuse
Check fuse for parking lights (same circuit) Check bulbs could be a bad headlight switch
Check the battery for corrosion or loose connection.
If you dash lights are not working check that your parking/brake lights are working also check fuses for cig lighter and interior lights that may help get the dash light working again.
If parking lights and dash lights are not working and fuse blows out, there might be a problem with battery corrosion. Check the components specific to the circuits of the affected lights. It might be loose.
CHECK THE FUSE PANEL DASH & TAIL LIGHTS WORK FROM SAME FUSE
Blown fuse or bad headlight switch
in dash lights
Replace the bulbs, change the fuse if its blown, and check the wiring to make sure its not damaged.
sol