Chevrolet Silverado Classic 2007 Owner's Manual page 414

If you put things inside your vehicle — like
suitcases, tools, packages, or anything
else — they go as fast as the vehicle goes.
If you have to stop or turn quickly, or if there
is a crash, they will keep going.
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.
414
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 372.
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.