2004 Pontiac Montana Owner's Manual - Page 170

When you carry cargo on the luggage carrier of a proper size and weight, put it on the slats, as far forward as you can. You can then tie it down. Don't exceed the maximum vehicle capacity when loading your vehicle. For more information on vehicle capacity and loading, see Loading Your Vehicle on page 4-33. To prevent damage or loss of cargo as you're driving, check now and then to make sure the cargo is still securely fastened. Rear Storage Area If you have the luggage carrier, you can load things on top of your vehicle. Notice: Loading cargo on the luggage carrier that weighs more than 150 lbs. (68 kg) or hangs over the rear or sides of the vehicle may damage your vehicle. Load cargo so that it rests on the slats as far forward as possible and against the side rails, making sure to fasten it securely. Your vehicle has a storage compartment and may have a cupholder on the driver's side of the vehicle, next to the third row seat(s). 2-56