1996 GMC SIERRA lock

The A/C button, between the temperature and mode
knobs, allows
the air coming into your vehicle to be
cooled. This setting
is useful for normal cooling on hot
days. When
you use A/C with the recirculation button
pushed
in, turn off recirculation as soon as the vehicle
reaches a comfortable interior temperature.
With the
A/C on, move the temperature knob to MAX
for maximum cooling.
This setting also puts the system
in the recirculation mode and helps
to maximize your air
conditioner’s performance and your vehicle’s fuel
economy. This setting also cools the air the fastest. After
the vehicle’s interior reaches a comfortable temperature,
move the temperature knob clockwise to place the air
conditioning system
in the normal mode.
Heating
The heater works best if you keep your windows closed
while using
it. On cold days, use the HEATER or
VENT/HEAT setting with the temperature knob in the
red area.
If you use the engine coolant heater before starting your
engine (in cold weather (20°F (-8°C) or lower), your
heating system
will produce warmer air faster, to heat
the passenger compartment
in cold weather. The
use
of an engine coolant heater also reduces the
time
it takes for the engine to reach normal operating
temperature, and shortens the time
it takes the heater to
reach full output. For more information, see “Engine
Coolant Heater”
in the Index.
Ventilation System
For mild outside temperature when little heating or
cooling
is needed, use VENT to direct outside air
through
your vehicle. Air will flow through the
instrument panel outlets.
Your vehicle’s ventilation systeril supplies outside air
to the inside of your vehicle when it is moving. With
the side windows closed, air will flow into the front
air inlet grilles, through the vehicle, and out the air
exhaust valves.
Outside air will
also enter the vehicle when the heater or
the air conditioning fan is running, unless you have
the
recirculation button pushed in. For more information on
the recirculation button, see “Air Conditioning” earlier
in this section.
3-4
ProCarManuals.com

Setting the Clock for Systems without
Automatic Tone Control
Press SFT. Within five seconds, press and hold the
SEEK right arrow
until the correct minute appears on
the display. Press and hold the SEEK left arrow until the
correct hour appears
on the display.
Setting the Clock for Systems with
Automatic Tone Control
Press and hold HR until the correct hour appears on
the display. Press and hold
MIN until the correct
minute appears
on the display. To display the clock
with
the ignition off, press RECALL and the time
will
be displayed for a few seconds. There is an
initial two-second delay before the clock goes into
the time-set mode.
AM-FM Stereo
Playing the Radio
VOLUME-BAL: Turn the knob clockwise to turn the
radio on and counterclockwise
to turn it off. To increase
the volume, turn
the knob clockwise. To decrease the
volume, turn the knob counterclockwise. Display the
time
with the ignition off by pressing the
VOLUME-BAL knob. When the radio
is playing, press
this button
to recall the station frequency.
. 3-7
ProCarManuals.com

ANI-FM Stereo with Cassette Tape Player
(Option)
Playing the Radio
VOLUME-BAL: Turn the knob clockwise to turn the
radio on and counterclockwise to turn it off. To increase
the volume, turn the knob clockwise.
To decrease the
volume, turn the knob counterclockwise.
RECALL: Display the time with the ignition off by
pressing
the RECALL knob. When the radio is playing,
press this button to recall
the station frequency.
Find.ing a Station
AM-FM: Press the lower knob to get AM or FM.
TUNE: Turn this knob to tune in radio stations.
SEEK: Press this button and the radio will tune to the
next higher or lower station and stay there.
PUSHBUTTONS: The four numbered pushbuttons let
you return to your favorite stations. You can set up to
14 stations (seven AM and seven FM).
1. Tune in the desired station.
2. Press SET.
3. Press and hold one of the four pushbuttons, within
five seconds. Whenever you press that numbered
button, the station you set will return.
In addition to the four stations set
as above, up to three
additional stations may be preset on each band by
pressing two adjoining buttons
at the same time. Just:
1. Tune in the desired station.
2. Press SET.
3. Press two adjoining buttons at the same time,
within five seconds. Whenever you press the same
two buttons,
the station you set will return.
4, Repeat these steps for each pair of buttons.
ProCarManuals.com

AM-FM Stereo with Cassette Tape and
Automatic Tone Control (Option)
Playing the Radio
PWR-VOL:
Press this knob to turn the system on and
off. Turn this control clockwise to increase the volume
and counterclockwise
to decrease the volume. The faster
the PWR-VOL
knob is rotated, the quicker the volume
is increased or decreased.
RECALL: Press this button to switch between the clock
and the radio station frequency displayed when the radio
is on. Also, press this button
to display the time when
the ignition is off.
SCV This is the Speed-Compensated-Volume (SCV)
knob. Move the control ring behind the PWR-VOL
knob clockwise
to adjust the SCV. Set the volume at the
desired level.
As you drive, the SCV automatically
increases the volume, as necessary, to overcome road
and wind noise at
any particular speed. The volume
should always sound the same. Each clockwise position
on the control ring allows for more compensation at a
faster rate.
Finding a Station
AM-FM: Press this button to switch between AM, FM1
and FM2. The display will show your selection.
TUNE: Press lightly on this knob to release it from its
stored position. Rotate the
knob clockwise to increase
frequency and counterclockwise to decrease frequency.
When finished tuning, press the knob again
to return it
to its stored position.
SEEK: Press the right arrow to tune to the next
higher station and the left
mow to tune to the next
lower station and stay there, The sound will mute
while seeking.
3-11
~~
ProCarManuals.com

Setting the Tone Playing a
Cassette Tape
BASS: Press lightly on this knob to release it from its
stored position. Turn the knob clockwise
to increase the
bass and counterclockwise to decrease the bass. When
the BASS control is rotated, the AUTO TONE setting
will change to
MAN. Push the knob back in to its stored
position when done.
TREB: Press lightly on the TREB knob to release it
from its stored position. Turn the knob clockwise to
increase the treble and counterclockwise to decrease
the treble. When the
TREB control is rotated, the
AUTO TONE setting will change to MAN. Push the
knob back
in to its stored position when done.
Adjusting the Speakers
BAL: Press this button to remove the control from its
stored position. Turn the control clockwise to adjust
sound to the right speakers and counterclockwise to
adjust sound
to the left speakers. Press the button again
to return BAL to its stored position.
FADE: Press this button to remove the control from its
stored position. Turn the control clockwise to adjust the
sound to the front and counterclockwise for rear
speakers. Press the button again to return
FADE to its
stored position.
Your tape player is built to work best with tapes that are
30 to 45 minutes long on each side. Tapes longer than
that are
so thin they may not work well in this player.
To load a cassette tape with the ignition off. press
EJECT or RECALL. Then, insert the cassette tape.
If the ignition is on but the radio is off, the tape will
begin playing.
The player automatically senses
if the cassette tape
is metal or CI-02 and adjusts for best playback sound.
For metal tapes, the double-D symbol will appear on
the display.
Once
the tape is playing. use the VOL, BAL, FADE,
TREB and BASS controls just as you do for the radio.
The tape symbol and
a direction arrow will be on the
display whenever
a tape is being played. Anytime a tape
is inserted. the top side is selected for play first.
PREV (1): Press the PREV or the SEEK left arrow to
search for the previous selection. A minitnurn
three-second blank pap
is required for the player to stop
at the beginning of the selection. The tape direction
arrow will blink during the
SEEK operation.
PROG (2): Press this button to switch frotn one side of
the tape to the other.
3-13
ProCarManuals.com

AM-FM Stereo with Compact Disc Player
and Automatic Tone Control (Option)
Playing the Radio
PWR-VOL: Press this knob to turn the system on and
off.
Turn this control clockwise to increase the volume
and counterclockwise
to decrease the volume. The faster
the PWR-VOL knob is rotated, the quicker the volume
is increased or decreased.
RECALL: Press this button to switch between the clock
and the radio station frequency displayed when
the radio
is
on. Also, press this button to display the time when
the ignition
is off.
S ~ J: This is the Speed-Compensated-Volume (SCV)
knob. Move the control ring behind the PWR-VOL
knob clockwise to adjust the SCV. Set the volume at the
desired level.
As you drive, the SCV automatically
increases the volume, as necessary, to overcome road
and wind
noise at any particular speed. The volume
should always sound the same. Each clockwise position
on the control ring allows for more compensation at a
faster rate.
Finding a Station
AM-FM: Press this button to switch between AM,
FMl and FM2. The display will show your selection.
TUNE: Press lightly on this knob to release it from its
stored position. Rotate the knob clockwise to increase
frequency and counterclockwise
to decrease frequency.
When finished tuning, press
the knob again to return it
to its stored position.
SEEK: Press the right arrow to tune to the next higher
station and the left arrow to tune
to the next lower
station and stay there. There will be
no sound when
using
the SEEK feature.
3- 17
ProCarManuals.com

BAS Press'lightly on this knob to release it from its
stored position. Turn the knob clockwise to increase the
bass and counterclockwise to decrease the bass. When
the
BASS control is rotated, the AUTO TONE setting
will change to
MAN. Push the knob back in to its stored
position when done.
TREB: Press lightly on the TREB knob to release it
from its stored position. Turn the knob clockwise to
increase the treble and counterclockwise
to decrease the
treble. When the TREB control is rotated, the AUTO
TONE setting will change to MAN. Push the knob back
in to its stored position when done.
Adjusting the Speakers
BAL: Press this button to remove the control from its
stored position. Turn the control clockwise
to adjust
sound
to the right speakers and counterclockwise to
adjust sound to the left speakers. Press the button again
to return BAL to its stored position.
FADE: Press this button to remove the control from its
stored position. Turn
the control clockwise to adjust the
sound to
the front and counterclockwise for rear
speakers.
Press the button again to return FADE to its
stored position.
Playing a Compact Disc
PWR: Press this knob to turn the system on. (Please
note that
you can also turn the system on when
you insert a compact disc into the player with the
ignition on.)
Insert
a disc partway into the slot, label side up. The
player will pull it
in. Wait a few seconds and the disc
should play. CD and
a CD symbol will also appear on
the display. Anytime you are playing a
CD, the letters
CD will be
next to the CD symbol.
If the disc comes back out and ERR appears on the
display,
it could be that:
You are driving on a very rough road. (The disc
should play when the road gets smoother.)
The disc is upside down.
0 It is dirty, scratched or wet.
0 It is very humid. (If so, wait about an hour and
try again.)
The disc player is very hot.
Press RECALL
to make ERR go off the display.
3-19
ProCarManuals.com

Theft-Deterrent Feature
THEFTLOCK" is designed to discourage theft of your
radio.
It works by using a secret code to disable all radio
functions whenever battery power
is removed.
The
THEFTLOCK feature for the radio may be used or
ignored.
If ignored, the system plays normally and the
radio is not protected by the feature. If THEFTLOCK is
activated, your radio
will not operate if stolen.
When
THEFTLOCK is activated, the radio will display
LOC to indicate a locked condition anytime battery
power
is removed. If your battery loses power for any
reason, you must unlock the radio with the secret code
before
it will operate.
Activating the Theft-Deterrent Feature
The instructions which follow, explain how to enter your
secret code
to activate the THEFTLOCK system. It is
recommended that
you read through all nine steps
before starting the procedure.
NOTE: If you allow more than 15 seconds to elapse
between any steps, the radio automatically reverts to
time and you must start the procedure over at Step
4.
1. Write down any three or four-digit number from
000 to 1999 and keep it in a safe place separate from
the vehicle.
2.
3,
4.
5.
6.
7.
8.
9.
Turn the ignition to the ACCESSORY or
RUN position.
Turn the radio
off.
Press the 1 and 4 buttons together. Hold them down
until
--- shows on the display. Next you will use the
secret code number which
you have written down.
Press
MN and 000 will appear on the display.
Press
MN again to make the last two digits agree
with your code.
Press
HR to make the first one or two digits agree
with your code.
Press
AM-FM after you have confirmed that the
code matches the secret code
you have written down.
The display
will show REP to let you know that you
need to repeat Steps 5 through 7 to confirm your
secret code.
Press
AM-FM and this time the display will show
SEC to let you know that
your radio is secure. The
indicator by the volume control
will begin flashing
when the ignition
is turned off.
ProCarManuals.com