GMC YUKON XL 2003 Manual page 217

This message may also be displayed for brief periods if
you are driving at higher elevations and are pumping
your brakes or braking hard. The message may
clear after you've lifted your foot from the accelerator
pedal an allowed the vehicle to coast in gear or after you
have driven down to a lower elevation. This is a
normal operation of your brake system and does not
require that the brake system be serviced. However, if
the message does not clear, your brake system
needs service. While the message is displayed you will
notice that the brake pedal is harder to push and it
will take longer to stop. See Brake System Warning
Light on page 3-4 1.
Your brake system may not be working
properly if the REDUCED BRAKE POWER
message is displayed. If this message comes
on and stays on while driving, pull off the road
and stop carefully. The brake pedal will be
harder to push and it will take longer to stop.
CAUTION: (Continued)
If the messa is no longer displayed after you
have pulled off the road and stopped, you can
continue driving.
However, if the message is still displayed, or if
it comes on again when you are driving, there
is a problem with your brake system. If you
continue to drive with this message displayed
it
can lead to an accident. You should have the
vehicle towed for service. Also, see Brake
System Warning Light in the Index.
FUEL LEVEL LOW
If the fuel level is low, this message will appear on the
DIC and you will hear a chime. Refuel as soon as
possible. Pressing the select button will acknowledge
this message and clear it from the DIC display.
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