Why is dash board and tail lights in 2003 gmc safari not working?

The dashboard and tail lights on a 2003 GMC Safari may not be working due to several potential issues. Common causes include a blown fuse, a faulty dimmer switch, or a problem with the wiring or connectors. Additionally, a malfunctioning body control module (BCM) could disrupt the electrical signals necessary for these lights to function. Checking the fuses and connections is a good first step in diagnosing the problem.