Chevrolet 2003 Tahoe Owner's Manual page 216

SERVICE 4WD
REAR ACCESS OPEN
If a problem occurs with the four wheel drive system
this message will appear on the DIC. If this message
appears, stop as soon as possible and turn off the
vehicle. Restart the vehicle and check for the message
on the DIC display. If the message
is
still displayed,
or appears again when you begin driving, the four wheel
drive system needs service.
SERVICE RIDE CONTROL
If
a problem occurs with the suspension system, this
message will appear on the DIC. If this message
appears turn off the vehicle. Restart the vehicle and
check for the message on the DIC display. If the
message is still displayed, or appears again when you
begin driving, the ride control needs service.
TURN SIGNAL ON
If a turn signal is left on for 3/4 of a mile (1.2 km), this
message will appear on the display and you will
hear a chime. Move the turn signaVmultifunction lever to
the
off
position. Pressing the select button will
acknowledge this message and clear it from the DIC
display.
If the liftgate is open while the ignition is in RUN, this
message will appear on the DIC display and you
will hear a chime. Turn the vehicle off and check the
liftgate. Restart the vehicle and check for the message
on the DIC display. Pressing the select button will
acknowledge this message and clear
it
from the DIC
display.
REDUCED BRAKE POWER
If your vehicle has vacuum assist power brakes, this
message will be displayed and you may notice that the
brake pedal is harder to push and it will take longer
to stop. You may also hear a motor running and feel a
slight vibration in the brake pedal or steering wheel
when you apply or release the brake pedal even if your
foot is not on the brake pedal. This indicates that the
Supplemental Brake Assist system is working to
maintain braking power. If you are braking lightly, you
may not notice any difference in the operation of
your brakes.
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