Oldsmobile 2001 Silhouette - Manual (Page 174)

2-82
Luggage Carrier (Option)
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.
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, as well as sliding
crossrails and places to use for tying things down. These
let you load some things on top of your vehicle, as long
as they are not wider or longer than the luggage carrier.