Roof Rack System - GMC 2010 Sierra Owner's Manual

Roof Rack System

WARNING:
If something is carried on top of the vehicle that is
longer or wider than the roof rack
plywood, or a mattress
while the vehicle is being driven. The item being
carried could be violently torn off, and this could
cause a collision, and damage the vehicle. Never
carry something longer or wider than the roof rack
on top of the vehicle unless using a GM Certified
accessory carrier.
3-82
like paneling,
the wind can catch it
For vehicles with a roof rack, the rack can be used to
load items. For roof racks that do not have crossrails
included, GM Certified crossrails can be purchased
as an accessory. See your dealer for additional
information.
Notice: Loading cargo on the roof rack that weighs
more than 91 kg (200 lbs) or hangs over the rear or
sides of the vehicle may damage the vehicle. Load
cargo so that it rests evenly between the crossrails,
making sure to fasten cargo securely.
To prevent damage or loss of cargo when driving,
check to make sure crossrails and cargo are securely
fastened. Loading cargo on the roof rack will make the
vehicle s center of gravity higher. Avoid high speeds,
sudden starts, sharp turns, sudden braking or abrupt
maneuvers, otherwise it may result in loss of control.
If driving for a long distance, on rough roads, or at high
speeds, occasionally stop the vehicle to make sure the
cargo remains in its place.