GMC 2011 Sierra Denali Owner's Manual page 261

WARNING (Continued)
Heavy loads on the roof raise
the vehicle's center of gravity,
making it more likely to roll
over. You can be seriously or
fatally injured if the vehicle
rolls over. Put heavy loads
inside the cargo area, not on
the roof. Keep cargo in the
cargo area as far forward and
low as possible.
There are some important things to
remember about how to load your
vehicle.
The heaviest things should be
on the floor, forward of the rear
axle. Put heavier items as far
forward as you can.
Be sure the load is properly
secured, so things are not
tossed around.
You will find other important
information under Vehicle Load
Limits on page 9 23 and Tires on
page 10 46.
Environmental Concerns
Off-road driving can provide
wholesome and satisfying
recreation. However, it also
raises environmental concerns.
We recognize these concerns and
urge every off-roader to follow these
basic rules for protecting the
environment:
Always use established trails,
roads, and areas that have been
specially set aside for public
off-road recreational driving and
obey all posted regulations.
Avoid any driving practice
that could damage shrubs,
flowers, trees, or grasses or
disturb wildlife. This includes
wheel-spinning, breaking down
trees, or unnecessary driving
through streams or over soft
ground.
Driving and Operating
Always carry a litter bag and
make sure all refuse is removed
from any campsite before
leaving.
Take extreme care with open
fires (where permitted), camp
stoves, and lanterns.
Never park your vehicle over
dry grass or other combustible
materials that could catch fire
from the heat of the vehicle's
exhaust system.
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