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:

    Tire Pressure for High-Speed Operation
    WARNING Driving at high speeds, 160 km/h (100 mph) or higher, puts an additional strain on tires. Sustained high-speed driving causes excessive heat buildup and can cause sudden tire failure. You c ...

    Engine Compartment Fuse Block
    If the vehicle has a diesel engine, see the Duramax Diesel supplement for more information. If the vehicle is a hybrid, see the hybrid supplement for more information. The Engine Compartment Fuse Bl ...

    Brake System Warning Light
    The vehicle brake system consists of two hydraulic circuits. If one circuit is not working, the remaining circuit can still work to stop the vehicle. For normal braking performance, both circuits need ...