Buick LaCrosse: A/C OFF DUE TO HIGH 
ENGINE TEMP - Engine Cooling System Messages - Vehicle Messages - Instruments and Controls - Buick LaCrosse Owners ManualBuick LaCrosse: A/C OFF DUE TO HIGH ENGINE TEMP

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 automatically turns off.

When the coolant temperature returns to normal, the air conditioning compressor turns back on. You can continue to drive the vehicle.

If this message continues to appear, have the system repaired by your dealer as soon as possible to avoid damage to the engine.

    COOLANT LEVEL LOW ADD COOLANT
    This message will display if the coolant is low. See Engine Coolant. ...

    See also:

    Upper tether anchor/key cylinder covers
    CAUTION Never force the covers into place because the hinge pins can be damaged. Follow the removal and installation instructions to prevent inoperability of the covers. ...

    Towing with a sling-type truck
    Do not tow with a sling-type truck to prevent body damage. ...

    Engine Coolant
    The cooling system in the vehicle is filled with DEX-COOLВ® engine coolant mixture. See Recommended Fluids and Lubricants and Maintenance Schedule for more information. The following explains ...