My brake lights won't go off and I'm getting a message on the dashboard that has trackoff and a yellow antilock light

If the dashboard mileage light on your 2001 Buick Regal LS is very dim and the Service Vehicle Soon (SVS) light and antilock light stay on, there could be a few potential causes for this issue. Here are some things you can check:

1. Dim dashboard light: If the dashboard mileage light is very dim, it could be due to a burnt-out bulb or a problem with the dimmer switch. Try turning up the brightness using the dimmer switch, and if that doesn't work, check the bulb and replace it if necessary.
2. SVS light and antilock light: The SVS light and antilock light staying on could indicate a problem with the car's computer system or with the antilock brake system. It could be caused by a faulty sensor, a wiring issue, or a problem with the computer itself. It's recommended to have the car's computer system scanned for error codes to determine the root cause of the issue.
3. Battery or charging system: A weak battery or faulty alternator can cause electrical issues in the car, which could be related to the dim dashboard light and the warning lights staying on. Have the battery and charging system checked to rule out this possibility.

Your flasher is buzzing because it's a piezo instead of a flasher. I don't know how that would have been connected, but it is. Replace it with a flasher. The E brake light is on because the pull handle is still out just enough to connect it or it stays on because the antilock brake light is lit. Your dash and run lights have a blown fuse, headlights are on a separate fuse is why they still work. Water leaking from the roof shouldn't effect the electrical circuits, but most likely you have a wire or so crossed in the system.

The brake sensors. Cars with antilock brakes have an amber or yellow warning light, which usually says ABS. If this light stays illuminated after the bulb check, it indicates a problem with the antilock braking system. The ABS controller will disable the system and your brakes should function as if you don't have ABS. In this case, you can safely drive the car to a mechanic for service.

that there is a problem with the antilock brake system. it could be something simple like a loose wire connector on the wheel

Whenever this warning light or any other stays on in the dash it is indicating that the systems control module (or the system sensor in the case of lights like low oil pressure, door open indicators etc.) has detected a fault, it then disables the system (this applies to ABS,TCS, TCM, SRS and BCM faults and others) as long as the light is on. You must now have the dealer hook up a special electronic diagnostic tool and "scan" the system for the fault code that is stored for the problem(s)

Legend of Abbreviations. ABS Antilock brake system.TCS Traction control system, TCM Transmission control module, SRS Supplemental restraint system, BCM Body control module

Pull the fuse or pull the plug off the unit. But I think you will loose your speedometer.

If the parking brake switch is not stuck and the fluid level is OK, try tapping on the fluid reservoir to see if the light flickers or goes off. (you need 2 people to do this) If it flickers or goes off then replace your fluid level sensor. (You may have to buy a complete reservoir or master cylinder depending on your car ) If this does not provide any results, then you may have an internal leak in your master cylinder or Antolock Hydraulic Control Module causing the Proportioning Sensor Switch to turn the light on. At this point. I would tow it to a shop and have the Antilock Control Module scanned to see why it has turned the light on and disabled your Antilock Brake System. I do not recommend driving the car at all until the RED brake warning lamp problem has been resolved. It is OK to operate the vehicle (cautiously) with the YELLOW Antilock brake lamp on.

Low brake fluid,air in brake system,dirty sensors down at the hub or bad sensor at hub, bad sensor at abs or brake master cylinder

Generally the brake lining and ABS lights operate independently. Brake linings light will illuminate when there is a circuit to earth through the sensor leads. This is either worn out brakes or a faulty sensor but you'll need to get the wheels off to see.
The ABS light will require a fault code read to work out what the fault is.
Yellow inspection light means it needs a service. This needs to be reset at the time of service using a reset tool on your model.
Good luck

That's for the abs system only, not the brake lights. All brake lights are not working? Check the brake light switch (aka stop light switch), which is attached to the upper brake pedal, and has a wire attached to it. If it's shot, the brake lights won't work. If this is not the problem, let me know so I can help further.