First, the ABS light means the anti-lock system isn't working. It does NOT mean you have no brakes.
The usual reason is a problem with a wheel speed sensor, either the sensor itself or the wiring to it. If you are handy, look around underneath to see if there are dangling wires by a wheel - it may have been pulled loose or broken. If you are more mechanically inclined, you can dig into the wheel sensors. Different chassis use different ABS systems, but I'm guessing your '08 Sunova is probably a Ford chassis. Can you identify it? If a V10 engine, its a Ford...
If you are not mechanically inclined, head to a Ford truck dealer or a brake shop that does ABS stuff as well as brake pads and such.