Buick 2011 Lucerne Owner's Manual page 204

This message displays when service is required for the
vehicle. See your dealer. See Engine Oil on page 6 17
and Scheduled Maintenance on page 7 3 for more
information.
Acknowledging the CHANGE ENGINE OIL SOON
message will not reset the OIL LIFE REMAINING. That
must be done at the OIL LIFE screen under the vehicle
information menu. See Oil Life under DIC Operation
and Displays on page 4 41 and Engine Oil Life System
on page 6 22.
This message displays when the driver door is not
closed properly. Make sure that the door is closed
completely.
This message displays when the engine coolant
becomes hotter than the normal operating temperature.
To avoid added strain on a hot engine, the air
conditioning compressor is automatically turned off.
When the coolant temperature returns to normal, the
A/C operation automatically resumes. You can continue
to drive your vehicle. If this message continues to
appear, have the system repaired by your dealer as
soon as possible to avoid compressor damage.
4-48
This message displays when the engine coolant
temperature is too hot. Stop and allow the vehicle to
idle until it cools down.
This message displays along with a continuous chime
when the engine has overheated. Stop and turn the
engine off immediately to avoid severe engine damage.
See Engine Overheating on page 6 35.