The headlights and tail lights don't work, signals don't work, and the lights on the dash are also broken. however, the interior lights and brake lights work just fine. i'm thinking mayb

SOURCE: tail lights and dash lights in 98 Silverado don't work

same prob with my 98 gmc sierra, is your air bag light and security light on on your dash?

SOURCE: '97 Malibu, dash lights don't work

Check your fuses. The dash lights are on a different fuse. Also check dimmer switch. If its not one, then it is the other. Try working dimmer switch quickly back and forth( with the lights on when it's dark so you can see if they come on).

SOURCE: dash lights and tail light not working

Head light Switch Most likley

SOURCE: brake lights/rear turn signals not working

chk ur fuses

SOURCE: No tail lights on 1991 Chevy Silverado. fuse is good

sounds like a broken wire in the harness. look around the bumper area,sometimes along the frame. may have to peel back some tape covering. also if you have a trailer harness look closely at those.