GM Service Manual Online
For 1990-2009 cars only

If your vehicle has a convenience net, the convenience net attaches to the floor or back wall of the rear of the vehicle using six anchor points. The net can be used like a hammock across the rear of the vehicle or hooked on the floor. Put small loads, like grocery bags, behind the net. It can help keep them from falling over during sharp turns or quick starts and stops.

The net is not for larger, heavier loads. Store them in the rear of the vehicle as far forward as you can.