I have three 1997 Olds Cutlass's. They do it to! Nothing to worry about. They will do that in response to a bump, or washboard road driven over at a certain speed. The wheel speed sensor on each wheel tells the computer how fast each wheel is turning. If one wheel speed is faster than the other three, as when you hit a bump, the computer thinks it is loosing traction and flashes the light, and may or may not engage the ABS system to even up the speed on all four wheels.
Now if that light comes on, and STAYS on, that is another matter. It will only do that if a wheel speed sensor becomes faulty, and then the ABS light will override the traction light.
Drive on!!!
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