ABS light on 2006 Chevrolet Equinox

Why does my ABS light comes on and my brakes work fine, then the light goes off and my left front brake grabs.

Asked by for the 2006 Chevrolet Equinox
Well, the ABS light will commonly come on because of a problem with the wheel speed sensors. This, however, would not explain the behavior of your left front brake.

If this is not intermittent, I'd take the car to a shop and reproduce the behavior for a technician. Also, here's more information on the ABS warning light:
i had same prob.there is whats called a sensor harness on the left front;s the wire that plugs into your sensor on your wheelbearing;s about a foot long and runs from your sensor to a plug just inside your fender well.costs 39 bucks on amazon.there is a diif one a little higher on price.i went for the cheaper one just to see.bammmm fixed prob.i chased my tail on this for 6;s called speed sensor harness
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Low Brake Fluid