Cellular and GPS Antennas

Avoid placing items over or near the antenna to prevent blocking cellular and GPS signal reception. Cellular reception is required for OnStar to send remote signals to the vehicle.

    See also:

    Engine Coolant Temperature Gauge
    Metric English This gauge shows the engine coolant temperature. Under normal driving conditions the gauge will read approximately 100°C (210°F) or less. If the gauge pointer is near 125°C (26 ...

    Skidding
    There are three types of skids that correspond to the vehicle's three control systems: • Braking Skid — wheels are not rolling. • Steering or Cornering Skid — too much speed or steering in a ...

    Tachometer
    The tachometer displays the engine speed in revolutions per minute (rpm). For a description of how Grade Braking affects vehicle speed while the Tow/Haul Mode is activated, see Tow/Haul Mode on page 9 ...