GMC 2006 Sierra 1500 Pickup Owner's Manual page 365

CAUTION:
{
Things you put inside your vehicle can strike
and injure people in a sudden stop or turn, or
in a crash.
•
Put things in the cargo area of your
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 your vehicle.
•
When you carry something inside the
vehicle, secure it whenever you can.
•
Do not leave a seat folded down unless
you need to.
There is also important loading information for off-road
driving in this manual. See "Loading Your Vehicle
for Off-Road Driving" under Off-Road Driving on
page 4-16.
Two-Tiered Loading
By positioning four 2 inches (5 cm) by 6 inches (15 cm)
wooden planks across the width of the pickup box,
you can create an upper load platform. The planks
must be inserted in the pickup box depressions.
The length of the planks must allow for at least a
3/4 inch (2 cm) bearing surface on each end of
the plank.
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.
Any load that extends beyond the vehicle's taillamp
area must be properly marked according to local laws
and regulations.
Remember not to exceed the Gross Axle Weight
Rating (GAWR) of the front or rear axle.
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