abs light on on 2000 Pontiac Montana

it is always on

2 answers
ABS warning light indicates a fault condition on the ABS brake system, low brake fluid or faulty wheel speed sensor. Learn more; http://repairpal.com/abs-warning-light
a common problem with montanas is the wheel berrings. they wear out and triggers the abs light. first, try testing your abs system by stopping quick. if the abs works, then i think it's the wheel berrings.