Audio Steering Wheel Controls - GMC 1999 Envoy Owner's Manual

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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.
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7. Press AM FM after you have confirmed that the
code matches the secret code you have written down.
The display will show
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.
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, indicating that the radio is
To unlock a secured radio, see "Unlocking the
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Theft Deterrent Feature After a Power Loss" earlier in
this section.

Audio Steering Wheel Controls

You can control certain radio functions using the buttons
on your steering wheel.
If a cassette tape is playing, press this button to play the
other side of the tape. If a compact disc is playing in the
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console mounted CD changer, press this button to go to
the next available CD.
yellowblue
PROG: Press this button to
play a station you have
programmed on the radio
preset buttons on the
selected band.
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