Brakes are fine on dry road, but a little snow, ABS sound and approx 25-30 yards to stop

This is my daughter's boyfriends car, but I used to own one also. My ABS never was that loud, not let the car drift that long. Also, I stood outside and had him break while going past me, outside of the light slowing, while he's full bore on the breaks, I couldn't tell he had hit the brakes even for a split second.

While, no doubt, may sound like a dumb question, but I've been working on my own cars, and some others, sine my 77 Nova. I'm not good at the computer based systems and trying to save this kid some $$$. This breaking distance is EXTREME. I've never experienced this. Any other suggestions would help. Just drove the same road in my 15 Silverado, stopped like I was on the main road, maybe max, and extra 1-2 feet.

Could be a bunch of things, but seized calipers come to mind as well as air in the system. Of course, as you say, with electronics involved the old school symptoms sometimes mean totally different things. Scan it for trouble codes as well, and it may in fact be time to get professional help in spite of the cost. Sounds like the car is becoming unsafe.

By any chance were tires cold on the dirt road? The ABS system will only activate if the tire is slipping, on a dirt road and if the tires are cold they will have a lot less traction, which will impair stopping distance. On a normal road tires already have more traction than on a dirt road so it could be that if his tires are old or the compound of the tires are hard then traction is compromised. This doesn't seem like air in the system or a mechanical failure as it will not fix itself. It could also need a brake fluid flush. Brake fluid is hygroscopic meaning it will collect water and will make the brake petal very squishy. This will impair stopping distance and could cause the issue you are having but it again would not go away on its own

Great Feedback. The tires are in great shape and when I was testing it out, yes cold tires. However, I was alerted to it after my daughter and him came from an hour away, taking some back roads an main. He stated, it did it whenever the surface had any snow, along with once they arrived at our house. It's also showing no lights or alerts in the screen. I do have a mechanic, backyard mechanic, that I'm going to get involved.