GMC CHEVROLET Silverado 6500HD 2019 Owner's Manual page 198

Before Driving Off-Road
Have all necessary maintenance
and service work completed.
Fuel the vehicle, fill fluid levels,
and check inflation pressure in
all tires, including the spare,
if equipped.
Read all the information about
four-wheel-drive vehicles in this
manual.
Know the local laws that apply to
off-road driving.
To gain more ground clearance if
needed, it may be necessary to
remove the front fascia lower air
dam, if equipped. However, driving
without the air dam reduces fuel
economy.
Caution
Operating the vehicle for
extended periods without the front
fascia lower air dam installed can
cause improper airflow to the
engine. Reattach the front fascia
air dam after off-road driving.
Loading the Vehicle for
Off-Road Driving
Warning
Unsecured cargo on the
load floor can be tossed
about when driving over
rough terrain. You or your
passengers can be struck
by flying objects. Secure the
cargo properly.
Keep cargo in the cargo
area as far forward and as
low as possible. The
heaviest things should be
on the floor, forward of the
rear axle.
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.
Driving and Operating
For more information about loading
the vehicle, see Vehicle Load Limits
0 205 and Tires 0 331.
Environmental Concerns
Always use established trails,
roads, and areas that have been
set aside for public off-road
recreational driving and obey all
posted regulations.
Do not damage shrubs, flowers,
trees, or grasses or disturb
wildlife.
Do not park over things that
burn. See Parking over Things
That Burn 0 215.
Driving on Hills
Driving safely on hills requires good
judgment and an understanding of
what the vehicle can and cannot do.
Warning
Many hills are simply too steep
for any vehicle. Driving up hills
can cause the vehicle to stall.
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