Two-Tiered Loading; Add-On Equipment - GMC 2012 Sierra Owner's Manual

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Depending on the model of your
pick up, an upper load platform
can be created by positioning
three or four 5 cm (2 inches) by
15 cm (6 inches) 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.
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.
When you carry removable
items, you may need to put a
limit on how many people you
carry inside your vehicle. Be
sure to weigh your vehicle
before you buy and install the
new equipment.
Remember not to exceed
the Gross Axle Weight
Rating (GAWR) of the front or
rear axle.
Ladder Rack
340 kg
and Cargo
(750 lbs)
Cross Toolbox
181 kg
and Cargo
(400 lbs)
Side Boxes
113 kg per
and Cargo
side (250 lbs
per side)
* The combined weight for all
rail mounted equipment should
not exceed 454 kg (1,000 lbs).

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