CTS V8-5.7L VIN P (2004)
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Global Positioning System Antenna: Description and Operation
GLOBAL POSITIONING SYSTEM (GPS) ANTENNA
The GPS locates the current position of the vehicle using signals sent by GPS satellites. The GPS antenna is attached to the I/P carrier and can be
accessed by removing the I/P retainer. The GPS antenna is powered through the same coaxial cable used to send the signals to the navigation radio.
Interference to the system may occur if any of the following exist:
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Signals are obstructed by objects such as, tall buildings or trees
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Metallic objects located on the dashboard
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Aftermarket glass tinting has been applied to the vehicles windshield