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.

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    Footnotes — Maintenance Schedule Additional Required Services — Severe
    a) Vehicles with different size front and rear tires do not have tire rotation. See Tire Rotation. b) Or every two years, whichever comes first. c) Check all fuel and vapor lines and hoses f ...