GMC Jimmy 2004 Owner's Manual page 126

You can adjust the crossrails to handle loads of various
sizes. Just loosen the slider knobs at each end of
the crossrail and move them to where you want them.
Make sure both sides of the crossrails are even,
then tighten the slider knobs.
Be sure the cargo is properly loaded. Follow these
guidelines:
•
Carrying small, heavy loads on the roof is not
recommended.
•
Secure the load using the tie downs at both ends of
the crossrails. When loading cargo directly on the
roof panel, use the crossrails to keep the load from
shifting.
•
If you need to carry long items, move the crossrails
as far apart as possible. Tie the load to the tie
downs provided. Also tie the load to the bumpers.
Do not tie the load so tightly that the crossrails
or side rails are damaged.
2-60
Notice: Loading cargo on the luggage carrier that
weighs more than 200 lbs. (918 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.
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 4-54.
To prevent damage or loss of cargo as you're driving,
check now and then to make sure the luggage
carrier and cargo are still securely fastened.