Tail lights and dash lights not working

The dash and tail lights are on two different circuits, and the brake and turn signals are on different circuits, so at least 4 circuits total.
I would start at the headlight switch and check for power on the first two issues.

Look at fuse #18, a 15 amp fuse, in the fuse block. This fuse powers both the tail lights and instrument cluster lights. Usually both of these light systems are powered by the same fuse so when your cluster isn't lit up you'll know right away that your tail lights aren't working as it's not safe to drive without tail lights. Your brake, turn, and head lamps are powered by different circuits. Hope this helps and good luck!

That does not make any sense. Do the tail lights work? There are supposed to be separate filaments for brake lights, tail lights, and turn signals. In particular the center brake light should not be possible to be confused with tail lights or signals. Does it come on? If not, then you probably have no brake lights at all, and that is probably because of the bad fuse or the switch on the brake pedal for the brake lights.
If there is some sort of cross over between tail light and brake lights, that is usually from a bad light socket ground; which results in current backing up from one system to another. But then each is usually only half brightness.

The odds are the one fuse is blown for the dash and the tail lights. And the wrong bulb may have been put in for the brake light. The brake light is feeding back into the tail light circuit causing the fuse to blown out.

Change out the bulbs with OEM bulbs and replace the blown fuse. That should fix the problem.

try turning your lights on.....

I changed all the bulbs in the tail lights after cleqaning all the connections, then sealed the lens around the trunk with clear silicone sealant. This solved most of the problem. The rain would get in around the lens and short the connections. The emergency brake light indicator and the ABS indicator still go on and off, but I havent checked the sensor yet.

YOU MAY NEED A LIGHT FAILURE SENSOR WHICH IS LOCATED IN THE TRUNK ON THE DRIVERS SIDE

more than likely blown fuse the dash lights will not work if the tail lights blow a fuse in most cases and that will let you know the tail lights are not working, same if a blinker is blown they will flash fast or light up on the dash and not flash letting you know there is a problem on that side

try a stronger fuse

Sounds like faulty light switch... especially if all the lights are on after you hot-wire. Common GM issue especially if its the cluster type(turn signal switch). Read more >> Options >>