2007 Chevrolet HHR Owner's Manual - Page 146

Roof Rack System Your vehicle may be equipped with a roof rack system. {CAUTION: If you try to carry something on top of your vehicle that is longer or wider than the luggage carrier - like paneling, plywood, a mattress and so forth - the wind can catch it as you drive along.This can cause you to lose control. What you are carrying could be violently torn off, and this could cause you or other drivers to have a collision, and of course damage your vehicle. You may be able to carry something like this inside. But, never carry something longer or wider than the luggage carrier 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 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. Notice: Loading cargo directly on the roof of the vehicle may cause damage to the vehicle and would not be covered under warranty. Do not place cargo on the roof the vehicle. Do not exceed the maximum vehicle capacity when loading your vehicle. For more information on vehicle capacity and loading, see Loading Your Vehicle on page 269. To prevent damage or loss of cargo as you are driving, check frequently to ensure your cargo is securely fastened. The roof rack system has siderails that are attached to the roof. All cargo must be loaded on the luggage carrier crossrails only. Use GM accessory racks that are compatible with your roof rack system, these are available at your GM dealer. 146