I have found the problem with my cobalt ,
there is a knob on the left side of the dash board near the steering wheel
you can adjust the brightness my knob was turned down
I hope this info can help any one with this problem .
I have had a number of customers over the years not know that there is a dimmer. This has been on various makes and models. This must not be an uncommon mistake to accidentally move the dimmer and cause the user to think the lights or fuse have gone bad.