Pontiac 2006 GTO Owner's Manual page 140

Rest Reminder
After the ignition is turned to ON, a timer will start. After
two hours of continuous driving, the trip computer
automatically shows the rest reminder display. See
"REST REMINDER" under Vehicle Personalization on
page 2-31 for more information.
Service Engine Oil
See Scheduled Maintenance on page 6-4 and Engine
Oil on page 5-13 for more information.
3-42
This symbol and message
alert you when you may
have been travelling for too
long without a break.
If this symbol and the
Service Engine Oil
message come on after
you start the engine,
it means that service is
required for your vehicle.
See your GM dealer.
Service Error (X Symbol)
If the Service Error message or the X symbol comes on,
it indicates a fault in the trip computer. See your
GM dealer for service.
Service Vehicle Soon
When this message displays, see your GM dealer as
soon as possible.
The Service Vehicle Soon message will display until the
MODE button is pressed. The message then returns
to the original trip computer display with a small
SVS message on the right. The SVS message will
remain until the condition is repaired.
This symbol and the
Service Vehicle Soon
message will come on and
a chime will sound if
there is a problem with
your vehicle.