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Home >> Cadillac >> 2011 >> Escalade EXT >> Repair and Diagnosis >> External Pages >> Different car >> Section 867 (Cellular System, Entertainment System, And Navigation System) >> Diagnostic Information and Procedures >> OnStar Global Positioning System (GPS) Data Not Current or Inaccurate >> Circuit/System Verification
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Circuit/System Verification

WARNING: This page is about a different car, the 2007 GMC Sierra and 2007 Chevrolet Silverado. However, it is still accessible from the selected car via links, so may be relevant.
IMPORTANT: It is important to have the vehicle in an open outside area where a cellular call can be successfully placed and GPS data can be received from satellites. It is also necessary to inform the OnStar® Call Center advisor that this call is for vehicle diagnostic purposes.
  1. With the scan tool, observe the GPS signal status indicator for at least 10 seconds. Verify the indicator displays Yes.
    • If the indicator does not display Yes, go to Component Testing.
  2. Call and verify the OnStar advisor receive GPS data.
    • If the advisor did not receive GPS data and the call was a 'fail to voice', contact the GM Technical Assistance Center.
    • If the advisor did not received GPS data and the call was not a 'fail to voice', go to Component Testing.
  3. Verify with the OnStar Call Center advisor that your actual position is within a reasonable distance from the actual location of the vehicle.
    • If your actual position is not within a reasonable distance from the actual location of the vehicle, replace the VCIM.
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