GMC CHEVROLET Silverado 1500 2021 Owner's Manual page 226

the actual loads on the front and rear
axles, weigh the vehicle at a weigh
station. Your dealer can help with this.
Be sure to spread the load equally on
both sides of the centerline.
The Certification/Tire label also contains
important information about the Front
Axle Reserve Capacity. See Adding a
Snow Plow or Similar Equipment 0 317.
Warning
In the case of a sudden stop or
collision, things carried in the bed of
your truck could shift forward and
come into the passenger area,
injuring you and others. If you put
things in the bed of your truck, you
should make sure they are properly
secured.
Caution
Overloading the vehicle may cause
damage. Repairs would not be covered by
the vehicle warranty. Do not overload the
vehicle.
Using heavier suspension components
to get added durability might not
change the weight ratings. Ask your
dealer to help load the vehicle the
right way.
Warning
Things you put inside the vehicle can
strike and injure people in a sudden
stop or turn, or in a crash.
Put things in the cargo area of the
vehicle. Try to spread the weight
evenly.
Never stack heavier things, like
suitcases, inside the vehicle so
that some of them are above the
tops of the seats.
Do not leave an unsecured child
restraint in the vehicle.
When you carry something inside
the vehicle, secure it whenever
you can.
Do not leave a seat folded down
unless you need to.
Driving and Operating
There is also important loading
information for off-road driving in this
manual. See Loading the Vehicle for
Off-Road Driving under Off-Road
Driving 0 215.
Two-Tiered Loading
Depending on the model of the pickup,
an upper load platform can be created
by positioning three or four 5 cm (2 in)
by 15 cm (6 in) wooden planks across
the width of the pickup box. The planks
must be inserted in the pickup box
depressions.
When using this upper load platform,
be sure the load is securely tied down
to prevent it from shifting. The load's
center of gravity should be positioned
in a zone over the rear axle. The zone is
located in the area between the front
of each wheel well and the rear of each
wheel well. The center of gravity height
must not extend above the top of the
pickup box flareboard.
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