OnStar Overview
EmergencyService Vehicle Soon Light
For vehicles with this light, it
comes on if a condition exists that may require the vehicle to be taken in for service.
If the light comes on, take the vehicle to your dealer for service as soon as
possible.
Owner Manual Indicator
This symbol is shown when you need
to see the owner manual ...
If No Steam Is Coming from the Engine Compartment
If an engine overheat warning is displayed but no steam can be seen or heard,
the problem may not be too serious. Sometimes the engine can get a little too hot
when the vehicle:
Climbs a long hill on a hot day.
Stops after high-speed driving.
Idles for long periods in traffic.
If the ...
Engine Coolant Temperature Warning Light
This light comes on briefly while
starting the vehicle.
If it does not, have the vehicle serviced by your dealer. If the system is working
normally the indicator light goes off.
Caution
The engine coolant temperature warning light indicates that the
vehicle has overheated. Driving with this ...