Page 363 of 472

●The system is designed as an aid to the
driver in detecting large stationary ob-
jects to help avoid damaging the ve-
hicle. The system will not detect small
objects below the bumper, and may not
detect objects close to the bumper or
on the ground.
● If your vehicle sustains damage to the
rear bumper fascia, leaving it mis-
aligned or bent, the sensing zone may
be altered causing inaccurate measure-
ment of obstacles or false alarms.
The Rear Sonar System (RSS) sounds a tone to
warn the driver of obstacles near the rear bumper
when the shift selector is in R (Reverse) . The
system may not detect objects at speeds above 3
mph (5 km/h) and may not detect certain angular
or moving objects.
The RSS detects obstacles up to 3 ft (1.0 m)
from the rear bumper with a decreased coverage
area at the outer corners of the bumper, (refer to
the illustration for approximate zone coverage
areas) . As you move closer to the obstacle, the
rate of the tone increases. When the obstacle is
less than 12 in (30.0 cm) away, the tone will
sound continuously. If the RSS detects a station-
ary or receding object further than 12 in (30.0
cm) from the side of the vehicle, the tone will sound for only 3 seconds. Once the system de-
tects an object approaching, the tone will sound
again.
The RSS automatically turns on when the shift
selector is placed in R (Reverse) and the ignition
switch is ON. The front and rear sonar system off
switch on the instrument panel allows the driver
to turn the RSS on and off. To turn the RSS off,
the ignition switch must be ON, and the shift
selector in R (Reverse) . An indicator light on the
switch will illuminate when the system is turned
off. If the indicator light illuminates when the RSS
is not turned off, it may indicate a malfunction in
the RSS.
Keep the RSS sensors (located on the rear
bumper fascia) free from snow, ice and large
accumulations of dirt (do not clean the sensors
with sharp objects) . If the sensors are covered, it
will affect the accuracy of the RSS.
Page 364 of 472

●The system is designed as an aid to the
driver in detecting large stationary ob-
jects to help avoid damaging the ve-
hicle. The system will not detect small
objects below the bumper, and may not
detect objects close to the bumper or
on the ground.
● If your vehicle sustains damage to the
front bumper fascia, leaving it mis-
aligned or bent, the sensing zone may
be altered causing inaccurate measure-
ment of obstacles or false alarms.
The Front Sonar System (FSS) sounds a tone to
warn the driver of obstacles near the front
bumper when the shift selector is in a forward
gear. The system may not detect objects at
speeds above 3 mph (5 km/h) and may not detect
certain angular or moving objects.
The FSS detects obstacles up to 3 ft (1.0 m) from
the front bumper with a decreased coverage area
at the outer corners of the bumper, (refer to the
illustration for approximate zone coverage areas) .
As you move closer to the obstacle, the rate of the
tone increases. When the obstacle is less than
12 in (30.0 cm) away, the tone will sound con-
tinuously. If the FSS detects a stationary or re-
ceding object further than 12 in (30.0 cm) from
the side of the vehicle, the tone will sound for only 3 seconds. Once the system detects an object
approaching, the tone will sound again.
The FSS automatically turns on when the shift
selector is placed in a forward gear and the
ignition switch is ON. The front and rear sonar
system off switch on the instrument panel allows
the driver to turn the FSS on and off. To turn the
FSS off, the ignition switch must be ON, and the
shift selector in D (Drive) . An indicator light on the
switch will illuminate when the system is turned
off. If the indicator light illuminates when the FSS
is not turned off, it may indicate a malfunction in
the FSS.
Keep the FSS sensors (located on the front
bumper fascia) free from snow, ice and large
accumulations of dirt (do not clean the sensors
with sharp objects) . If the sensors are covered, it
will affect the accuracy of the FSS.FREEING A FROZEN DOOR LOCK
To prevent a door lock from freezing, apply de-
icer through the key hole. If the lock becomes
frozen, heat the key before inserting it into the key
hole or use the remote keyless entry keyfob.
ANTI-FREEZE
In the winter when it is anticipated that the tem-
perature will drop below 32°F (0°C) , check the
anti-freeze to assure proper winter protection.
For details, see “Engine cooling system” in the
“Maintenance and do-it-yourself” section of this
manual.
BATTERY
If the battery is not fully charged during extremely
cold weather conditions, the battery fluid may
freeze and damage the battery. To maintain maxi-
mum efficiency, the battery should be checked
regularly. For details, see “Battery” in the “Main-
tenance and do-it-yourself” section of this
manual.
DRAINING OF COOLANT WATER
If the vehicle is to be left outside without anti-
freeze, drain the cooling system, including the
engine block. Refill before operating the vehicle.
COLD WEATHER DRIVING
Starting and driving5-33
REVIEW COPY—2010 Armada
(wzw)
Owners Manual (owners)—USA_English (nna)
02/17/09—debbie
Page 367 of 472

TIRE PRESSURE MONITORING
SYSTEM (TPMS)
This vehicle is equipped with the Tire Pressure
Monitoring System (TPMS) . It monitors tire pres-
sure of all tires except the spare. When the low
tire pressure warning light is lit, one or more of
your tires is significantly under-inflated. If
equipped, the system also displays pressure of
all tires (except the spare tire) on the display
screen by sending a signal from a sensor that is
installed in each wheel. If the vehicle is being
driven with low tire pressure, the TPMS will acti-
vate and warn you of it by the low tire pressure
warning light. This system will activate only when
the vehicle is driven at speeds above 16 MPH
(25 km/h) . For more details, refer to
“Warning/indicator lights and audible reminders”
in the “Instruments and controls” section, “Tire
pressure information” in the “Monitor, climate,
audio, phone and voice recognition systems”
section and “Tire Pressure Monitoring System
(TPMS)” in the “Starting and driving” section.
Page 419 of 472
If you have a flat tire, see “Flat tire” in the
“In case of emergency” section of this
manual.
TIRE PRESSURE
Tire Pressure Monitoring System
(TPMS)
This vehicle is equipped with the Tire
Pressure Monitoring System (TPMS) . It
monitors tire pressure of all tires except
the spare. When the low tire pressure
warning light is lit, one or more of your
tires is significantly under-inflated. If
equipped, the system also displays pres-
sure of all tires (except the spare tire) on
the display screen by sending a signal
from a sensor that is installed in each
wheel.
The TPMS will activate only when the
vehicle is driven at speeds above 16 MPH
(25 km/h) . Also, this system may not de-
tect a sudden drop in tire pressure (for
example a flat tire while driving) .
For more details, refer to “Low tire pres-
sure warning light” in the “Instruments and
controls” section, “Tire pressure informa-