1998 Buick LeSabre Owner's Manual - Page 182

The anti-lock systemcan change the brake pressure faster than any driver could.The computer is programmed to make the mostof available tire and road conditions. ... Here's how anti-lock works. Let's.say the road is wet. You're driving safely. Suddenly an animal jumps out in front of you. You slam on the brakes. Here's what happens with ABS, You can steeraround the obstacle while braking hard. As you brake, your computer keepsreceiving updates on wheel speed and controls braking pressure accordingly. A computer senses that wheels are slowing down. If one of the wheels is about to stop rolling, the computerwill separately work the brakes at each frontwheel and at both rear wheels. 4-8