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.
fairly sure it is behind the kick panel on the left hand side of the vehicle. just in forward of the front seat
The fuse box is located on the passenger side. Remove the foot well plastic cover and you will see a black cover high up on the side. The fuse is a 15 amp. Cover should have a diagram on it.
The interior light fuse on the 2003 GMC is located under the rear seat on the driver's side in the back fuse box. The fuse is number four.
There should not be one for the interior light.
you can pull the fuse
CHECK BOTH THE INTERIOR FUSE AND THE COURTSY FUSE
The fuse that says "room".
interior light fuse
Fuse 15
i was told its the same fuse as the interior light
In the fuse box.