1999 GMC JIMMY display

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3-36
P.SCAN: Press this button to hear the tracks in random,
rather than sequential, order. RANDOM will appear on
the display. Press P.SCAN again to turn off random play.
TAPE AUX: Press this button if you have a disc loaded
in the changer and the radio is turned on, to play a
compact disc. Press AM
-FM to return to the radio when
a compact disc is playing. Press TAPE AUX to switch
between the tape and console
-mounted CD changer if
both are loaded.
If your vehicle is equipped with the AM
-FM Stereo with
Compact Disc Player (Bose), all of the CD changer
functions are controlled by the radio buttons, except for
ejecting the CD magazine.
PREV (1): Press this button or the SEEK left arrow to
go to the previous track if the current selection has been
playing for less than eight seconds. If the PREV button
is pressed and the current selection has been playing for
more than eight seconds, it will go to the beginning of
the current selection. If you hold or press this button
more than once, the player will continue moving back
through the disc. The sound will mute while seeking.
RDM (2): Press this button to hear the tracks in random,
rather than sequential, order. RANDOM will appear on
the display. Press RDM again to turn off random play.NEXT (3): Press this button or the SEEK right arrow to
go to the next track. If you hold the button or press it
more than once, the player will continue moving
forward through the disc. The sound will mute
while seeking.
REV (4): Press and hold this button to reverse quickly
through a track selection. Release it to resume playing.
(5): Press this button to select a disc. The disc number
and track number will be displayed.
FWD (6): Press and hold this button to advance quickly
through a track selection. Release it to resume playing.
SEEK: Press the right arrow to seek to the next
selection on the CD. Press the left arrow to search for
the previous selection on the CD. The sound will mute
while seeking.
CD AUX: Press this button if you have a disc loaded in
the changer and the radio is turned on, to play a compact
disc. Press AM
-FM to return to the radio when a
compact disc is playing. Press CD AUX to switch
between the compact disc and console
-mounted CD
changer if both are loaded.

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3-37
Compact Disc Changer Errors
If 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.)

A disc is upside down.

It is dirty, scratched or wet.

It is very humid. (If so, wait about an hour and
try again.)

The disc player is very hot.

The CD changer door is open. Completely close the
changer door to restore normal operation.

An empty magazine is inserted in the CD changer.
Try the magazine again with a disc loaded on one of
the trays.
Press RECALL to make ERR go off the display.
If any error occurs repeatedly or if an error cannot be
corrected, please contact your dealer.Theft-Deterrent Feature (If Equipped)
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 has been interrupted. If your battery loses power
for any reason, you must unlock the radio with the secret
code before it will operate.

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3-38
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. Turn the ignition to ACCESSORY or RUN.
3. Turn the radio off.
4. 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.
5. Press MN and 000 will appear on the display.
6. Press MN again to make the last two digits agree
with your code.
7. Press HR to make the first one or two digits agree
with your code.8. 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.
9. Press AM
-FM and this time the display will show
SEC to let you know that your radio is secure. The
LED indicator by the volume control will begin
flashing when the ignition is turned off.
Unlocking the Theft
-Deterrent Feature After a
Power Loss
Enter your secret code as follows; pause no more than
15 seconds between steps:
1. Turn the ignition on. LOC will appear on the display.
2. Press MN and 000 will appear on the display.
3. Press MN again to make the last two digits agree
with your code.
4. Press HR to make the first one or two digits agree
with your code.
5. Press AM
-FM after you have confirmed that the
code matches the secret code you have written down.
The display will show SEC, indicating the radio is
now operable and secure.

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3-39
If you enter the wrong code eight times, INOP will
appear on the display. You will have to wait an hour
with the ignition on before you can try again. When you
try again, you will only have three chances to enter the
correct code before INOP appears.
If you lose or forget your code, contact your dealer.
Disabling the Theft
-Deterrent Feature
Enter your secret code as follows; pause no more than
15 seconds between steps:
1. Turn the ignition to ACCESSORY or RUN.
2. Turn the radio off.
3. Press the 1 and 4 buttons together. Hold them down
until SEC shows on the display.
4. Press MN and 000 will appear on the display.
5. Press MN again to make the last two digits agree
with your code.6. Press HR to make the first one or two digits agree
with your code.
7. Press AM
-FM after you have confirmed that the
code matches the secret code you have written down.
The display will show
---, indicating that the radio is
no longer secured.
If the code entered is incorrect, SEC will appear on the
display. The radio will remain secured until the correct
code is entered.
When battery power is removed and later applied to a
secured radio, the radio won't turn on and LOC will
appear on the display.
To unlock a secured radio, see ªUnlocking the
Theft
-Deterrent Feature After a Power Lossº earlier in
this section.

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3-42 Care of Your Cassette Tape Player
A tape player that is not cleaned regularly can cause
reduced sound quality, ruined cassettes or a damaged
mechanism. Cassette tapes should be stored in their
cases away from contaminants, direct sunlight and
extreme heat. If they aren't, they may not operate
properly or may cause failure of the tape player.
Your tape player should be cleaned regularly after every
50 hours of use. Your radio may display CLN to indicate
that you have used your tape player for 50 hours without
resetting the tape clean timer. If this message appears on
the display, your cassette tape player needs to be
cleaned. It will still play tapes, but you should clean it as
soon as possible to prevent damage to your tapes and
player. If you notice a reduction in sound quality, try a
known good cassette to see if it is the tape or the tape
player at fault. If this other cassette has no improvement
in sound quality, clean the tape player.
The recommended cleaning method for your cassette
tape player is the use of a scrubbing action,
non
-abrasive cleaning cassette with pads which scrub
the tape head as the hubs of the cleaner cassette turn.
The recommended cleaning cassette is available through
your dealership (GM Part No. 12344789).When using a scrubbing action, non
-abrasive cleaning
cassette, it is normal for the cassette to eject because
your unit is equipped with a cut tape detection feature
and a cleaning cassette may appear as a broken tape. To
prevent the cleaning cassette from being ejected, use the
following steps.
If your vehicle is equipped with the AM
-FM Stereo with
Cassette Tape Player:
1. Turn the ignition to RUN or ACCESSORY.
2. Turn the radio on.
3. Insert the scrubbing action cleaning cassette.
4. Within five seconds, press and hold the REV and
FWD buttons at the same time for three seconds. The
tape symbol on the display will flash, showing that
the cut tape detection feature is no longer active.
5. Eject the cleaning cassette after the manufacturer's
recommended cleaning time.
If your vehicle is equipped with the AM
-FM Stereo with
Cassette Tape Player and Automatic Tone Control:
1. Turn the ignition to RUN or ACCESSORY.
2. Turn the radio off.

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3-43
3. Press and hold the TAPE AUX button for five
seconds. The tape symbol on the display will flash
for two seconds.
4. Insert the scrubbing action cleaning cassette.
5. Eject the cleaning cassette after the manufacturer's
recommended cleaning time.
When the cleaning cassette has been ejected, the cut tape
detection feature is active again.
You may also choose a non
-scrubbing action, wet-type
cleaner which uses a cassette with a fabric belt to clean
the tape head. This type of cleaning cassette will not
eject on its own. A non
-scrubbing action cleaner may
not clean as thoroughly as the scrubbing type cleaner.
The use of a non
-scrubbing action, dry-type cleaning
cassette is not recommended.
After you clean the player, press and hold EJECT for
five seconds to reset the CLN indicator. The radio will
display
--- to show the indicator was reset.
Cassettes are subject to wear and the sound quality may
degrade over time. Always make sure the cassette tape is
in good condition before you have your tape
player serviced.
Care of Your Compact Discs
Handle discs carefully. Store them in their original cases
or other protective cases and away from direct sunlight
and dust. If the surface of a disc is soiled, dampen a
clean, soft cloth in a mild, neutral detergent solution and
clean it, wiping from the center to the edge.
Be sure never to touch the signal surface when handling
discs. Pick up discs by grasping the outer edges or the
edge of the hole and the outer edge.
Care of Your Compact Disc Player
The use of CD lens cleaner discs is not advised, due to
the risk of contaminating the lens of the CD optics with
lubricants internal to the CD mechanism.
Fixed Mast Antenna
The fixed mast antenna can withstand most car washes
without being damaged. If the mast should ever become
slightly bent, you can straighten it out by hand. If the
mast is badly bent, as it might be by vandals, you should
replace it.
Check every once in a while to be sure the mast is still
tightened to the fender.

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9-10
Service 4WD Light 2-84 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Service and Appearance Care 6-1 . . . . . . . . . . . . . . . . . . . . . .
Service and Owner Publications 8-12, 8-13 . . . . . . . . . . . . . .
Service Engine Soon Light 2-81 . . . . . . . . . . . . . . . . . . . . . . .
Service Parts Identification Label 6-58 . . . . . . . . . . . . . . . . . .
Service Work, Doing Your Own 6-2 . . . . . . . . . . . . . . . . . . . .
Servicing Your Air Bag-Equipped Vehicle 1-29 . . . . . . . . . . .
Sheet Metal Damage 6-55 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Shift Light 2-26, 2-78 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Shifting 2-21, 2-24 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Into Park 2-34 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Out of Park 2-37 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Signaling Turns 2-42 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Skidding 4-13 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Specifications and Capacities 6-65 . . . . . . . . . . . . . . . . . . . . . .
Speech Impaired, Customer Assistance 8-4 . . . . . . . . . . . . . . .
Speedometer 2-75 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Stains, Cleaning 6-51 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Starter Switch Check 7-42 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Starting Your Engine 2-19 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Steam 5-9 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Steering
In Emergencies 4
-10 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Power 4-9 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Steering Wheel, Tilt 2-41 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Storage Compartments 2-55 . . . . . . . . . . . . . . . . . . . . . . . . . . .
Storage, Vehicle 6-33 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Storing a Flat or Spare Tire and Tools 5-28 . . . . . . . . . . . . . . .
Stuck: In Sand, Mud, Ice or Snow 5-32 . . . . . . . . . . . . . . . . . .
Sun Visors 2-66 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Sunglasses Storage 2
-61 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Sunroof 2-67 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Symbols, Vehicle v. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Tachometer 2-75 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Taillamp Bulb Replacement 6-38 . . . . . . . . . . . . . . . . . . . . . . .
Tape Player Care 3-42 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Temperature and Compass Display 2-58 . . . . . . . . . . . . . . . . .
Theft 2-13 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
THEFTLOCK
3-37 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Thermostat 6-24 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Third Gear, Automatic Transmission 2-23 . . . . . . . . . . . . . . . .
Third Gear, Manual Transmission 2-25 . . . . . . . . . . . . . . . . . .
Tilt Steering Wheel 2-41 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Time, Setting 3-10 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Tire Chains 6-48 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Tire Inflation Check 7-40 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Tire Loading 4-42 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Tires
Alignment and Balance 6
-47 . . . . . . . . . . . . . . . . . . . . . . . .
Buying New 6-45 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Changing a Flat 5-19 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cleaning 6-55 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Inflation 6-42, 7-39 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Inspection and Rotation 6-43 . . . . . . . . . . . . . . . . . . . . . . . .
Pressure 6-42 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Temperature 6-47 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Traction 6-46 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Treadwear 6-46 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Uniform Quality Grading 6-46 . . . . . . . . . . . . . . . . . . . . . . .