1997 Chevy S-10 growling noise

Yes. This noise is in fact the abs pump motor engaging abs system due to a incorrect reading from one of your wheel speed sensors. This is so common on these trucks. What happens is when you are slowing down the abs system loses a wheel speed signal due to the air gap being too big for the wheel speed sensor. This is caused by either a loose hub bearing or rust being built up under the speed sensor itself. Gm actually recalled a lot of them and they would remove the sensors and clean the mounting surfaces and reinstall old sensors. Hope this helps