1996 GMC Suburban Owner's Manual - Page 114

Cargo Tie Downs Luggage Carrier (Option) If you have the optional luggage carrier, you can load things on top of your vehicle. The luggage carrier has slats and side rails attached to the roof, and crossrails which can be moved towards the front or the rear in the side rails to help secure cargo. Tie the load to the side rails or side rail supports. I NOTICE: ' There are cargotie downs in the rear cargo area that allow you to strap cargo in and keep it from moving inside the vehicle, When not using the tie downs, flip them down out of the way. Loading cargo that weighs more than 200 Ibs. (90.6 kg) on the luggagecarrier may damage your vehicle. When you carry large things, never let them hang over the rear or sides of your the so vehicle. Load your cargo that it rests on the slats and does not scratch or damage the vehicle. Put the cargo against the side rails and fasten it securely to the luggage carrier. 2-50