GMC Express 2011 Owner's Manual page 214

8-8 Climate Controls
Air Delivery Mode Control:
Turn clockwise or counterclockwise
to change the direction of the airflow
in the rear seating area.
To change the current mode, select
one of the following:
H
(Vent): Air is directed to the
upper outlets, with some directed to
the floor outlets.
2
(Floor): Air is directed to the
floor outlets.
Be sure to keep the area under the
front seats clear of any objects so
that the air inside of the vehicle can
circulate effectively.
For information on how to use
the main climate control system,
see Climate Control Systems on
page 8 1. For information on
ventilation, see Air Vents on
page 8 8.
Air Vents
Use the outlets located near the
center and on the sides of the
instrument panel to change the
direction of airflow.
Operation Tips
Clear away any ice, snow or
leaves from the air inlets at
the base of the windshield that
may block the flow of air into
the vehicle.
Use of non-GM approved hood
deflectors may adversely affect
the performance of the system.
Keep the path under the front
seats clear of objects to help
circulate the air inside of the
vehicle more effectively.