The problem may be with your park brake cables. Over time they become rusted and corroded and they pull out and won't go back, holding the brake shoes or pads against the brake surface and need to be replaced. However the problem could be the latch that holds the park brake lever in place when it is on. If if the release button does not unlock the lever, It won't release. The gear type latch may need lubricated with rust and grease dissolving solvent until it moves freely.
Hope this fixes your problem
if they are daytime running lights you can not shut them off without pulling the fuse. but if you are parked and want them to go off you can apply the emergency brake and they will go off til you let off the emergency brake.
The emergency brake is on?
set the emergency brake
Try topping the brake fluid up
The brake light switch is broken or out of adjustment.
you need a new brake pressure differential switch
Brake light switch went bad.
Might be a stuck brake light switch its located at the top of the brake pedal
Sounds like it sticking from under the brake pedal. Have the brake switch looked at. It may need to be adjusted of replaced.
your switch that tells the car that the brake is off is defective
Make sure the emergency brake pedal is retracted all the way up. Or check the switch at the E brake pedal. The headlights go off on all 1999 tahoes when the emergency brake is on.
it is usually a defective brake light switch which is attached to the break pedal usuall up under the dash.