If your vehicle has this feature, you can load cargo on top of your vehicle.
The luggage carrier consists of siderails attached to the roof and crossrails which can be moved back and forth to accommodate various cargo sizes.
Notice: Loading cargo on the luggage carrier that weighs more than 300 lbs. (136 kg) or hangs over the rear or sides of the vehicle can damage the vehicle. Load cargo only on top of the crossrails and tie the cargo down to the crossrail support cargo tie-down loops, making sure to fasten it securely.
Don't exceed the maximum vehicle capacity when loading your vehicle. For more information on vehicle capacity and loading, see Loading the Vehicle .
Adjust the crossrails to fit your load by doing the following:
Be sure you do not cover the roof marker lamps or the Center-High-Mounted Stoplamp (CHMSL) (If equipped) with cargo.
To prevent damage or loss of cargo check now and then to make sure the luggage and cargo are still securely fastened and the crossrails are tight.
If your vehicle has a sunroof, it will have a crossrail stop tab placed in the siderail in the spot labeled SUN--ROOF STOP. This tab prevents you from moving the crossrails past the opening of the sunroof and loading cargo too far forward.
Your vehicle will also have a stop tab in the crossrail in the spot labeled ON STAR STOP. This tab prevents loading cargo too close to the OnStar antenna which will cause the OnStar and navigation system (if equipped) to function improperly or not at all.
Vehicles with the off-road lamps will have additional stop tabs placed in the siderails to prevent you from moving the lamps too far rearward, causing them to shine into the optional sunroof opening.
Notice: If you drive your vehicle through an automatic car wash that does not have enough clearance for any roof-mounted accessories (such as off-road lamps or a roof basket) on your vehicle, you can damage your vehicle. To avoid damaging your vehicle in a car wash, remove any roof-mounted accessories if you can, and do not use an automatic car wash while roof-mounted accessories are on your vehicle. See Cleaning the Outside of Your Vehicle for more information.
The crossrails have built in channels to allow you to attach other items designed for this system, such as basket luggage carriers, bike racks, ski racks, etc.
To use the crossrail channels, do the following:
You will not be using the rub strip when using crossrail accessories. When you remove any crossrail accessory, be sure to reinstall the rub strip. To do this, press the rub strip in place until it seats into the channel of the crossrail.