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Engine Coolant Hot – AC
(Air Conditioning) Off
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
air conditioning compressor will turn back on. You can
continue to drive your vehicle.
If this message continues to appear, have the system
repaired by your GM dealer as soon as possible to avoid
compressor damage.
Engine Coolant Hot – Idle Engine
Notice: If you drive your vehicle while the engine
is overheating, severe engine damage may occur.
If an overheat warning appears on the instrument
panel cluster and/or DIC, stop the vehicle as soon as
possible. Do not increase the engine speed above
normal idling speed. See Engine Overheating
on page 5-29 for more information.
This message will appear when the engine coolant
temperature is too hot. Stop and allow the vehicle to
idle until it cools down.
Engine Overheated – Stop Engine
Notice: If you drive your vehicle while the engine
is overheating, severe engine damage may occur.
If an overheat warning appears on the instrument
panel cluster and/or DIC, stop the vehicle as soon as
possible. Do not increase the engine speed above
normal idling speed. See Engine Overheating
on page 5-29 for more information.
This message will appear when the engine has
overheated. Stop the vehicle and turn the engine off
immediately to avoid severe engine damage. See
Engine Overheating on page 5-29. A chime will also
sound when this message is displayed.
Engine Power Reduced
This message informs you that the vehicle is reducing
engine power because the transmission is being
placed in gear under conditions that may cause damage
to the vehicle’s engine or transmission. This also can
affect the vehicle’s ability to accelerate.
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