Engine Coolant Hot – AC(Air Conditioning) OffThis message displays when the engine coolantbecomes hotter than the normal operating temperature.To avoid added strain on a hot engine, the airconditioning compressor is automatically turned off.When the coolant temperature returns to normal, theair conditioning compressor will turn back on. You cancontinue to drive your vehicle.If this message continues to appear, have the systemrepaired by your GM dealer as soon as possible to avoidcompressor damage.Engine Coolant Hot – Idle EngineNotice: If you drive your vehicle while the engineis overheating, severe engine damage may occur.If an overheat warning appears on the instrumentpanel cluster and/or DIC, stop the vehicle as soon aspossible. Do not increase the engine speed abovenormal idling speed. See Engine Overheatingon page 5-29 for more information.This message will appear when the engine coolanttemperature is too hot. Stop and allow the vehicle toidle until it cools down.Engine Overheated – Stop EngineNotice: If you drive your vehicle while the engineis overheating, severe engine damage may occur.If an overheat warning appears on the instrumentpanel cluster and/or DIC, stop the vehicle as soon aspossible. Do not increase the engine speed abovenormal idling speed. See Engine Overheatingon page 5-29 for more information.This message will appear when the engine hasoverheated. Stop the vehicle and turn the engine offimmediately to avoid severe engine damage. SeeEngine Overheating on page 5-29. A chime will alsosound when this message is displayed.Engine Power ReducedThis message informs you that the vehicle is reducingengine power because the transmission is beingplaced in gear under conditions that may cause damageto the vehicle’s engine or transmission. This also canaffect the vehicle’s ability to accelerate.3-60
