I've got a 1998 Malibu that after a few minutes of driving all 4 of the brakes start grabbing and act like I'm applying the brakes. I've replaced the rear wheel cylinders and the front rubber hoses. I've bled the whole system and just cannot figure out what'* going on

Check for ABS codes? Is ABS light on? Does it feel like the ABS is activating?

Abs light is not on and not real sure if the abs is working. Is there a way to check that other than slamming on the brakes.