GMC 2010 Yukon/Yukon XL Owner's Manual page 377

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.
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.
It makes sense to plan your trip, especially when going
to a remote area. Know the terrain and plan your route.
Get accurate maps of trails and terrain. Check to see if
there are any blocked or closed roads.
It is also a good idea to travel with at least one other
vehicle in case something happens to one of them.
For vehicles with a winch, be sure to read the winch
instructions. In a remote area, a winch can be handy if
you get stuck but you will want to know how to use it
properly.
It is a good idea to practice in an area that is safe
and close to home before you go into the wilderness.
Off-roading requires some new and different skills.
Tune your senses to different kinds of signals.
Your eyes need to constantly sweep the terrain for
unexpected obstacles. Your ears need to listen for
unusual tire or engine sounds. Use your arms, hands,
feet, and body to respond to vibrations and vehicle
bounce.
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