GMC Chevrolet Tahoe 2003 Manual page 234

STABILITY SYS ACTIVE
You may see the STABILITY SYS ACTIVE message on
the DIC. It means that an advanced computer-controlled
system has come on to help your vehicle continue to go
in the direction in which you're steering.
®
Stabilitrak activates when the computer senses that
your vehicle is just starting to spin, as it might if you hit a
patch of ice or other slippery spot on the road. When the
system activates, you may hear a noise or feel a vibration
in the brake pedal. This is normal. When the STABILITY
SYS ACTIVE message is on, you should continue to
steer in the direction you want to go. The system is
designed to help you in bad weather or other difficult
driving situations by making the most of whatever road
conditions will permit.
STABILITY SYS DISABLED
The STABILITY SYS DISABLED message will turn on
when you press the Stabilitrak
stability control has been automatically disabled. To limit
wheel spin and realize the full benefits of the stability
enhancement system, you should normally leave
®
Stabilitrak on. However, you should turn Stabilitrak
if your vehicle gets stuck in sand, mud, ice or snow and
you want to "rock" your vehicle to attempt to free it, or if
you are driving in extreme off-road conditions and require
more wheel spin. See If You Are Stuck: In Sand, Mud, Ice
or Snow on page 4-56 . To turn the Stabilitrak
back on press the Stabilitrak
3-70
®
button, or when the
®
®
system
®
button again. There are
four conditions that can cause this message to appear.
One condition is overheating, which could occur if
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Stabilitrak activates continuously for an extended period
of time. The message will also be displayed if the brake
system warning light is on. See Brake System Warning
Light on page 3-42 . The message could be displayed if
the stability system takes longer than usual to complete
its diagnostic checks due to driving conditions. Also, if an
engine or vehicle related problem has been detected, and
the vehicle needs service, the message will appear.
The message will turn off as soon as the conditions that
caused the message to be displayed are no longer
present.
STABILITY SYS READY
Text under development.
TIGHTEN FUEL CAP
If the vehicle's fuel cap is not tightened properly this
message may appear along with the check engine light
on the instrument panel. Reinstall the fuel cap,
making sure to fully install the cap. See Filling Your
off Tank on page 5-9 . The diganostic system can determine
if the fuel cap has been left off or improperly installed.
A loose or missing fuel cap will allow fuel to evaporate
into the atmosphere. A few driving trips with the cap
properly installed should turn the light and message off.