Rear GMC SIERRA 2004 Repair Manual

Resetting the Power Foldaway Mirrors
You will need to reset the power foldaway mirrors if the
following occurs:
·They are accidentally manually folded/unfolded.
·The mirrors will not stay in the unfolded position.
·The mirrors shake and ¯utter at normal driving
speeds.
To reset the power foldaway mirrors, fold and unfold
then at least three times using the mirror controls. This
will reset them to their normal detent position.
Outside Automatic Dimming Mirror
If your vehicle is equipped with this feature, the
driver's outside mirror will adjust for the glare of
headlamps behind you. This feature is controlled by the
on and off settings found on the electrochromic
mirror. See
Automatic Dimming Rearview Mirror with
Compass and Temperature Display on page 2-57.
Outside Curb View Assist Mirrors
If your vehicle has the optional memory package
you may have this feature.
The vehicle's mirrors are capable of performing the curb
view assist mirror function. This feature will cause the
passenger's and/or driver's mirror to tilt to a preselected
position when the vehicle is in REVERSE (R). This
feature may be useful in allowing you to view the curb
when you are parallel parking. When the vehicle is
shifted out of REVERSE (R) and a short delay
has occurred, the passenger's and/or driver's mirror will
return to its original position.
To change the preselected tilt position, adjust the
mirrors to the desired position while the vehicle is in
REVERSE (R). When the vehicle is shifted out of
REVERSE (R), this new position is saved in memory as
the tilt position.
You may be able to enable/disable this feature through
the Driver Information Center. See
Driver Information
Center (DIC) on page 3-55.
2-63

Outside Convex Mirror
Your passenger's side mirror is convex. A convex
mirror's surface is curved so you can see more from the
driver's seat.
{CAUTION:
A convex mirror can make things (like other
vehicles) look farther away than they really are.
If you cut too sharply into the right lane, you
could hit a vehicle on your right. Check your
inside mirror or glance over your shoulder
before changing lanes.
Outside Heated Mirrors
The outside rearview mirrors with this option have a
defrost mode.
To turn on the defrost feature, press the rear window
defogger button. See ªRear Window Defoggerº under
Dual Automatic Climate Control System on page 3-26for
further information.
OnStaržSystem
OnStaržuses global positioning system (GPS) satellite
technology, wireless communications, and state of
the art call centers to provide you with a wide range of
safety, security, information and convenience services.
A complete OnStar
žuser's guide and the terms and
conditions of the OnStaržSubscription Service
Agreement are included in your OnStarž-equipped
vehicle's glove box literature. For more information, visit
www.onstar.com, contact OnStar
žat 1-888-4-ONSTAR
(1-888-466-7827), or press the blue OnStaržbutton to
speak to an OnStaržadvisor 24 hours a day, 7 days
a week.
A completed Subscription Service Agreement is required
prior to delivery of OnStar
žservices and prepaid
calling minutes are also required for OnStaržPersonal
Calling and OnStaržVirtual Advisor use. Terms and
conditions of the Subscription Service Agreement can be
found at www.onstar.com.
2-64

Front Storage Area
Your vehicle may have a center armrest storage
compartment in the front bench seat.
To open it, fold down the armrest and press the latch
handle located at the front of the armrest. Then, let the
lid pop up and swing open.
The storage compartment may have a cassette/compact
disc holder.
Center Console Storage Area
Your vehicle may be equipped with a console
compartment between the bucket seats.
To open it, press the button and swing the console
lid open.
Your vehicle may have a compact disc holder in the
console.
Your console may have a cupholder that swings down
for the rear seat passengers to use. The front cupholder
pulls out and swivels 180É to provide clearance
between tall beverage containers and the manual
transmission shift lever (if equipped).
Tonneau Cover
If your vehicle is equipped with a tonneau cover, follow
the directions below to remove the cover.
1. To remove, unsnap the
cover. Roll it up and
stow it using the buckle
and the strap located
at the front of the box.
2-67

A. Back rail
B. Side rail
C. Rear bowD. Center bow
E. Front bow
F. Front rail
2. Remove the tonneau cover from the notch in the
front rail on the driver's side of the vehicle.3. Remove the three bows by gently pushing them
against the spring-loaded end. The three bows
are labeled front, center, rear to remind you of the
order in which to reinstall them.
2-68

Audio System(s).............................................3-73
Setting the Time for Radios without Radio
Data Systems (RDS)..................................3-74
Setting the Time for Radios with Radio Data
Systems (RDS).........................................3-74
AM-FM Radio...............................................3-74
Radio with CD..............................................3-77
Radio with Cassette and CD..........................3-88
Radio with Six-Disc CD................................3-102
Rear Seat Entertainment System...................3-115
Rear Seat Audio (RSA)................................3-126
Theft-Deterrent Feature................................3-127Audio Steering Wheel Controls......................3-128
DVD Distortion............................................3-129
Radio Reception.........................................3-129
Care of Your Cassette Tape Player...............3-129
Care of Your CDs and DVDs........................3-130
Care of Your CD and DVD Player.................3-131
Cleaning the Video Screen...........................3-131
Fixed Mast Antenna....................................3-131
XMŸ Satellite Radio Antenna System
(48 Contiguous US States)........................3-131
Chime Level Adjustment...............................3-131
Section 3 Instrument Panel
3-2

Hazard Warning Flashers
Your hazard warning ¯ashers let you warn others. They
also let police know you have a problem. Your front
and rear turn signal lamps will ¯ash on and off.The hazard warning
¯asher button is located at
the top of the steering
column.
Your hazard warning ¯ashers work no matter what
position your key is in, and even if the key isn't in.
Press the button to make the front and rear turn signal
lamps ¯ash on and off. Press the button again to
turn the ¯ashers off.
When the hazard warning ¯ashers are on, your turn
signals won't work.Other Warning Devices
If you carry re¯ective triangles, you can use them to
warn others. Set one up at the side of the road about
300 feet (100 m) behind your vehicle.
3-6

Defogging and Defrosting
Fog on the inside of the windows is a result of high
humidity (moisture) condensing on the cool window
glass. This can be minimized if the climate control
system is used properly. There are two modes to choose
from to clear fog or frost from your windshield. Use
the defog mode to clear the windows of fog or moisture
and warm the passengers. Use the defrost mode to
remove fog or frost from the windshield more quickly.
Turn the right knob clockwise or counterclockwise
to select one of the following modes:
-(Defog):This mode directs the air to the ¯oor outlets,
windshield and the side window vents. The air
conditioning compressor will run automatically to
dehumidify the air to prevent window fogging. The
recirculation mode cannot be selected while in the
defog mode.
1(Defrost):This mode directs most of the air to the
windshield and the side window vents, with only a
little air directed to the ¯oor vents. The air conditioning
compressor will run automatically to dehumidify the
air to prevent window fogging. The recirculation mode
cannot be selected while in defrost mode.
Do not drive the vehicle until all the windows are clear.
Rear Window Defogger
The lines you see on the rear window warm the glass.
The rear window defogger uses a warming grid to
remove fog from the rear window.
<(Rear):Press this button to turn the rear window
defogger on or off. An indicator light in the button
will come on to let you know that the rear window
defogger is activated.
The rear window defogger will automatically turn off
several minutes after the button is pressed. Pressing the
button while the defogger is running can also turn off
the defogger.
If your vehicle is equipped with heated mirrors this
button will activate them.
Notice:Don't use anything sharp on the inside of
the rear window. If you do, you could cut or damage
the warming grid, and the repairs wouldn't be
covered by your warranty. Do not attach a temporary
vehicle license, tape, a decal or anything similar
to the defogger grid.
3-24

Outlet Adjustment
Use the air outlets located
in the center and on the
side of your instrument
panel to direct the air¯ow.
Your vehicle has air outlets that allow you to adjust the
direction and amount of air¯ow inside the vehicle.
Move the louvers up or down. Use the thumbwheel next
to or underneath the outlet to close the louvers. For
the most efficient air¯ow and temperature control, keep
the outlet in the fully opened position.
Rear seat outlets can be used to adjust air¯ow toward
either seating area, the ¯oor or upward. Move the center
louvers up or down to direct the air¯ow.
Operation Tips
·
Keep the hood and front air inlets free of ice, snow,
or any other obstruction (such as leaves). The
heater and defroster will work far better, reducing
the chance of fogging the inside of your windows.
·Keep the air path under the front seats clear
of objects. This helps air to circulate throughout your
vehicle.
·Adding outside equipment to the front of your
vehicle, such as hood-air de¯ectors, etc., may affect
the performance of the heating and air conditioning
system. Check with your dealer before adding
equipment to the outside of your vehicle.
3-25

Rear Window Defogger
If your vehicle has this feature, the lines you see on the
rear window warm the glass. The rear window
defogger uses a warming grid to remove fog from the
rear window.
<(Rear):Press this button to turn the rear window
defogger on or off. An indicator light in the button
will come on to let you know that the rear window
defogger is activated.
The rear window defogger will turn off about 10 minutes
after the button is pressed. If you need additional
warming time, press the button again.
If your vehicle is equipped with heated mirrors this
button will activate them.
Notice:Using a razor blade or sharp object to clear
the inside rear window may damage the rear
window defogger. Repairs would not be covered by
your warranty. Do not clear the inside of the rear
window with sharp objects.
Outlet Adjustment
Use the air outlets located
in the center and on the
side of your instrument
panel to direct the air¯ow.
Your vehicle has air outlets that allow you to adjust the
direction and amount of air¯ow inside the vehicle.
Move the louvers up or down. Use the thumbwheel next
to or underneath the outlet to close the louvers. For
the most efficient air¯ow and temperature control, keep
the outlet in the fully opened position.
Rear seat outlets can be used to adjust air¯ow toward
either seating area, the ¯oor or upward. Move the center
louvers up or down to direct the air¯ow.
3-32

{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.
{CAUTION:
If the air bag readiness light ever comes on
when you have turned off the air bag, it means
that something may be wrong with the air bag
system. The right front passenger's air bag
could in¯ate even though the switch is off.
If your vehicle is a regular cab pickup and this
ever happens, do not let anyone whom the
national government has identi®ed as a
member of a passenger air bag risk group sit
in the right front passenger's position (for
example, do not secure a rear-facing child
restraint in your vehicle) until you have your
vehicle serviced.
If your vehicle is an extended cab pickup and
this ever happens, do not let anyone whom the
national government has identi®ed as a
member of the passenger air bag risk group sit
in the right front passenger's position (for
example, do not secure a rear-facing child
restraint in the right front passenger's seat)
until you have your vehicle serviced.
3-39