ABS locking up but not releasing

Sounds like the ABS is activating and that may be due to the module itself.

Let's start with pulling codes and making sure we don't have anything that will point us in a different direction.

https://www.youtube.com/watch?v=rTtAnsOlZU4

https://www.youtube.com/watch?v=jr_Iv8T_Phk

What I would do is lift the vehicle and get the brakes to lock up and see which wheels are actually locking up.

If it is all of them then this is most likely the ABS module applying the brakes and not releasing them either due to a module issue or a sticking solenoid.

Here is a guide that will help with this:

https://youtu.be/lUotkKXG9dY

Also, once this is replaced you will need to bleed the ABS and base brakes so here is a guide that will help with that as well.

https://www.2carpros.com/articles/how-to-bleed-or-flush-a-car-brake-system

https://www.youtube.com/watch?v=nQRnKyVyMuQ&t=4s

I am also attaching the info below on how to replace this as well.

Please run through this and let us know what questions you have.