It's probably low on brake fluid or possibly a bad master cylinder. Add brake fluid and see if the problem gets better. If it doesn't go away, have someone help you bleed the air bubbles from the brake line. If that doesn't help, you may need to replace the master cylinder.
probably have broken parking brake cable.
Look under the dash on the 1996 suburban, and locate the brake light switch on the brake pedal arm. Remove the switch nut, and slide the switch out. Unplug the wires from the switch and install the new switch.
Recommend checking the operation of the switch that is actuated by the brake pedal itself. This switch is either mounted to the brake pedal or mounted under the dash and actuated by the movement of the pedal
A brake pedal going directly to the floor is a sign of a few things. First, you are in need of brake fluid. Second, the brake pads are probably almost worn out. They may be worn out past the point the ABS light would be active. The ABS light may also be burned out.
To remove the brake pedal on a 1998 Suburban, unscrew the bolt that holds it to the steering wheel column. There are several wires that also have to be disconnected from here that control brake lights.
The brake light switch is out of alligment. Check on the brake pedal arm and readjust the switch.
follow the brake pedal to the house, and you will see the harness behind that. follow that harness and it will lead to a second plug that you can access on work on
The brake light switch may be bad or out of adjustment. The switch is located just above the brake pedal.
You must have a faulty brake light switch...it connects to the brake pedal...if you look up to the top of your brake pedal, you will see a little "box" with a button that is released when the pedal is pushed down. They are cheap and easy to replace.
The most common way to test this is,at a stop with your foot on the brake, the pedal will very slowly go to the floor, there is a test for this but you need to be good at auto repair.
On a 2008 Chevrolet Suburban, the emergency brake release is typically located near the driver's side, either on the floor next to the driver's seat or as a lever on the dashboard. If it's a floor-mounted release, you will find a lever or pedal that you can pull or press to disengage the brake. Always check your owner’s manual for specific details related to your vehicle's configuration.
Have you check all of the light bulbs? If yes, then check the ground next and then check the fuses. Lastly, if all of those check out, it is most likely the brake switch behind the brake pedal.