Engine Cooling When Trailer Towing

The cooling system may temporarily overheat during severe operating conditions. See Engine Overheating on page 10‑20.

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    Security Light
    The security light should come on briefly as the engine is started. If the system is working normally, the indicator light turns off. If it does not come on, have the vehicle serviced by your dealer ...

    Lockout Protection
    This feature protects you from locking the key in the vehicle when the key is in the ignition and a front door is open. If the driver side power door lock switch is pressed when the driver door is op ...

    Exterior
    GM says the Yukon Hybrid's exterior changes are intended to make the SUV more aerodynamic compared with the gas-powered Yukon. A modified bumper drops the regular Yukon's fog lights for some chunk ...