Rear Seat Armrest; Cargo Management System - GMC Sierra 2010 Owner's Manual

Do not exceed the maximum vehicle capacity when
loading the vehicle. For more information on vehicle
capacity and loading, see Loading the Vehicle on
page 5 30.
If small heavy objects are placed on the roof, cut a
piece of 3/8 inch plywood to fit inside the crossrails
and siderails to spread the load. Tie the plywood to
the siderail supports.
Tie the load and secure it to the crossrails or the
siderail supports. Use the crossrails only to keep
the load from sliding. To move a crossrail, lift the
release lever up, on both sides of the rail. Then
slide the crossrail to the desired position balancing
the force side to side. Press the release lever
down on both sides of the rail, down to tighten it.
Try to slide the crossrail back and forth slightly to
make sure it is tight.
To carry long items, move the crossrails as far
apart as possible. Tie the load to the crossrails and
the siderails or siderail supports. Also tie the load
to the bumpers, but do not tie the load so tightly
that the crossrails or siderails are damaged.
After moving a crossrail, be sure it is securely
locked into the siderail.
3-78
A Center High-Mounted Stoplamp (CHMSL) is located
above the rear window glass.
Make sure items loaded on the roof of the vehicle do
not block or damage the CHMSL.

Rear Seat Armrest

Vehicles with a rear seat armrest have two cupholders.
Pull the armrest down from the rear seatback to access
the cupholders.

Cargo Management System

For vehicles with a cargo management system, it is
located in the bed of the truck. The system contains
three rails located on the front and sides of the bed.
The system has four adjustable cargo tie-downs, that
can be placed on the upper and lower slides of the rail.