2004 GMC SIERRA Passenger sensing

The compass can be calibrated by driving the vehicle in
circles at ®ve mph (8 km/h) or less until the display
reads a direction.
Compass Variance
The mirror is set in zone eight upon leaving the factory.
It will be necessary to adjust the compass to
compensate for compass variance if you live outside
zone eight. Under certain circumstances, as during
a long distance cross-country trip, it will be necessary to
adjust for compass variance. Compass variance is
the difference between earth's magnetic north and true
geographic north. If not adjusted to account for
compass variance, your compass could give false
readings.
To adjust for compass variance:
1. Find your current location and variance zone
number on the following zone map.
2. Press and hold the COMP button for ®ve seconds
until a zone number appears in the display.
3. Press the COMP button on the bottom of the mirror
until the new zone number appears in the display.
After you stop pressing the button, the display
will show a compass direction within a few seconds.
Passenger Air Bag Indicator
Your mirror may be equipped with a passenger air bag
indicator on the mirror glass, just above the buttons.
If you have this feature the mirror will display the word
ON, or an airbag symbol in Canada, when the
passenger air bag is enabled. For more information see
Passenger Sensing System on page 1-81
2-59

Safety Belt Reminder Light
When the key is turned to RUN or START, a chime will
come on for several seconds to remind people to
fasten their safety belts, unless the driver's safety belt is
already buckled.
The safety belt light will
also come on and stay on
for several seconds, then it
will ¯ash for several more.
If the driver's belt is already buckled, neither the chime
nor the light will come on.
Air Bag Readiness Light
There is an air bag readiness light on the instrument
panel cluster, which shows the air bag symbol.
The system checks the air bag's electrical system for
malfunctions. The light tells you if there is an electrical
problem. The system check includes the air bag
sensors, the air bag modules, the passenger sensing
system (if equipped), the wiring and the crash sensing
and diagnostic module. For more information on the
air bag system, see
Air Bag Systems on page 1-70.
This light will come on
when you start your
vehicle, and it will ¯ash for
a few seconds. Then
the light should go out.
This means the system is
ready.
If the air bag readiness light stays on after you start the
vehicle or comes on when you are driving, your air
bag system may not work properly. Have your vehicle
serviced right away.
3-36

Air Bag Off Light
When you turn the right front passenger's air bag off,
this light will be lit and stay lit to remind you that the air
bag has been turned off. This light will go off when
you turn the air bag back on again. See
Air Bag
Off Switch on page 1-76for more on this, including
important safety information. The AIR BAG OFF light will
look like one of the following illustrations.
United States with Passenger Sensing System
United States without Passenger Sensing System
3-37

Canada with Passenger Sensing SystemCanada without Passenger Sensing System
3-38

Passenger Air Bag Status Indicator
If your vehicle has the passenger sensing system
your rearview mirror will have a passenger air bag status
indicator.
When the ignition key is turned to RUN or START, the
passenger air bag status indicator will light ON and
OFF, or the symbol for on and off, for several seconds
as a system check. Then, after several more seconds,the status indicator will light either ON or OFF, or either
the on or off symbol to let you know the status of the
right front passenger's frontal air bag.
If the word ON or the on symbol is lit on the passenger
air bag status indicator, it means that the right front
passenger's frontal air bag is enabled (may in¯ate).
{CAUTION:
If the on indicator comes on when you have a
rear-facing child restraint installed in the right
front passenger's seat, it means that the
passenger sensing system has not turned off
the passenger's frontal air bag. A child in a
rear-facing child restraint can be seriously
injured or killed if the right front passenger's air
bag in¯ates. This is because the back of the
rear-facing child restraint would be very close
to the in¯ating air bag. Don't use a rear-facing
child restraint in the right front passenger's seat
unless the air bag has been turned off. Passenger Air Bag Status Indicator ± United States
Passenger Air Bag
Status Indicator
± Canada
3-40

If the word OFF or the off symbol is lit on the passenger
air bag status indicator, it means that the passenger
sensing system or the air bag off switch has turned off
the right front passenger's air bag. See
Passenger
Sensing System on page 1-81orAir Bag Off Switch on
page 1-76for more on this, including important safety
information.
{CAUTION:
If the right front passenger's air bag is turned
off for a person who isn't in a risk group
identi®ed by the national government, that
person won't have the extra protection of an
air bag. In a crash, the air bag wouldn't be able
to in¯ate and help protect the person sitting
there. Don't turn off the passenger's air bag
unless the person sitting there is in a risk
group. See²Air Bag Off Switch²in the Index
for more on this, including important safety
information.If, after several seconds, all status indicator lights
remain on, or if there are no lights at all, there may be a
problem with the lights or the passenger sensing
system. See your dealer for service.
{CAUTION:
If the air bag off indicator and the air bag
readiness light ever come on together, it
means that something may be wrong with the
air bag system. If this ever happens, have the
vehicle serviced promptly, because an
adult-size person sitting in the right front
passenger seat may not have the protection of
the air bag. See²Air Bag Readiness Light²in
the Index.
3-41

BUCKLE SEATBELT
If your vehicle is equipped with the passenger sensing
system, this message reminds you to buckle the
driver's and/or passenger's seatbelt. See
Passenger
Sensing System on page 1-81. The message will come
on and a chime will sound when the ignition is in
RUN and the following conditions occur:
·The driver's seatbelt is unbuckled.
·The driver's seatbelt is unbuckled and the
passenger's seatbelt is unbuckled with the
passenger airbag enabled.
Press the select button to acknowledge the message
and clear it from the DIC display.
BUCKLE PASSENGER
If your vehicle is equipped with the passenger sensing
system, this message reminds you to buckle the
passenger's seatbelt. See
Passenger Sensing System
on page 1-81. This message will come on and a
chime will sound when the ignition is in RUN and the
driver's seatbelt is buckled and the passenger's seatbelt
is unbuckled with the passenger airbag enabled.
Press the select button to acknowledge this message
and clear it from the DIC display.
CARGO LAMP ON
If the cargo lamp is on, this message will appear on the
DIC and you will hear a chime. Turn off the vehicle
and check the liftgate. Restart the vehicle and check for
the message on the DIC display. Press the select
button to acknowledge the message and clear it from
the DIC display.
CHECK OIL LEVEL
If the oil level in the vehicle is low, this message will
appear on the DIC. Check and oil level and correct it as
necessary. You may need to let the vehicle cool or warm
up and cycle the ignition to be sure this message will
clear. Once the problem is corrected, pressing the select
button will clear this message from the DIC display.
CHECK WASHER FLUID
if the washer ¯uid level is low, this message will appear
on the DIC. Adding washer ¯uid will clear the message.
Press the select button to acknowledge the message
and clear it from the DIC display.
3-67

A
Accessory Power Outlets.................................3-20
Adding a Snow Plow or Similar Equipment.........4-64
Adding Washer Fluid.......................................5-46
Additional Program Information........................... 7-9
Additives, Fuel................................................. 5-6
Add-On Electrical Equipment...........................5-125
Add-On Equipment..........................................4-63
Adjusting the Speakers
(Balance/Fade)..................3-76, 3-80, 3-91, 3-105
After Off-Road Driving.....................................4-37
Air Bag
Off Light.....................................................3-37
Passenger Status Indicator...........................3-40
Readiness Light..........................................3-36
Air Bag Systems.............................................1-70
Adding Equipment to Your Air Bag-Equipped
Vehicle...................................................1-86
Air Bag Off Switch.......................................1-76
How Does an Air Bag Restrain?....................1-75
Passenger Sensing System...........................1-81
Servicing Your Air Bag-Equipped Vehicle.........1-86
What Makes an Air Bag In¯ate?....................1-74
What Will You See After an Air Bag In¯ates?......1-75
When Should an Air Bag In¯ate?...................1-73
Where Are the Air Bags?..............................1-72
Air Cleaner/Filter, Engine.................................5-23
Air Conditioning..............................................3-30
Airbag Sensing and Diagnostic Module (SDM)....7-10All Overseas Locations...................................... 7-5
AM .............................................................3-129
AM-FM Radio.................................................3-74
Antenna, Fixed Mast......................................3-131
Antenna, XMŸ Satellite Radio Antenna
System.....................................................3-131
Anti-lock Brake System..................................... 4-7
Anti-Lock Brake, System Warning Light..............3-45
Appearance Care..........................................5-116
Care of Safety Belts...................................5-119
Chemical Paint Spotting..............................5-123
Cleaning the Inside of Your Vehicle..............5-117
Cleaning the Outside of Your Vehicle............5-120
Finish Damage..........................................5-122
Sheet Metal Damage..................................5-122
Underbody Maintenance.............................5-123
Vehicle Care/Appearance Materials...............5-123
Weatherstrips............................................5-119
Approaching a Hill..........................................4-27
Ashtrays........................................................3-21
Audio Output................................................3-123
Audio System(s).............................................3-73
AM-FM Radio.............................................3-74
Audio Steering Wheel Controls....................3-128
Care of Your Cassette Tape Player...............3-129
Care of Your CD and DVD Player................3-131
Care of Your CDs and DVDs.......................3-130
Chime Level Adjustment.............................3-131
Fixed Mast Antenna...................................3-131
Radio with Cassette and CD.........................3-88
1