it is always on
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2000 Pontiac Montana Question: abs light on
fernando April 06, 2010, 14:01Master
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
Answer #2Visitor, August 29, 2010, 21:30
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.