Possibly defective or misadjusted brake light switch.
brake line has air...
First check the brake light fuse, if good, then test the brake light switch.
My coolant light come on want can it be.
check your e brake
Should be just up above on the brake pedal.
Open up the trunk lid, find the Phillips screws above the tail lights and the whole tail light bucket will pull out as one piece. Light sockets are behind.
Assumingly you're referring to the Center High Mounted Stop Lamp
If there is no light at all in whole dash. first check the fuse second check the headlight control switch.
I have a 93 Caprice and the cruise went out a few times. Check the third brake light in the back of the window. If it is out replace it and this might fix the problem. Also check the fuse as it controls the cruise and third brake light as well.
brake light plunger switch on the brake pedal maybe faulty, remove it and connect the two wires together and pull apart and see if lights go on and off
No.... You need to change the whole back tail piece