When pressing the brake pedal on my 99 sierra 4x4, my anti-lock wants to kick in at 5mph. Dosn't matter what speed I'm traveling, when I decelerate to 5mph, the anti-lock kicks in. Even worse, if I happen to hit the brake at exactly 5mph the brake pedal really 'locks' up and I have to pump the brakes like a mad fool to stop. This is a real problem when turning into a parking spot at the mall!!! Any ideas would be greatly appreciated,
Thanx, Mhud