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Home >> Chevrolet >> 2012 >> Chevy Express G1500, Van Passenger >> Repair and Diagnosis >> External Pages >> Different car >> Section 2327 (Cellular System, Entertainment System, And Navigation System) >> Diagnostic Information and Procedures >> OnStar Global Positioning System (GPS) Data Not Current or Inaccurate >> Circuit/System Verification

Circuit/System Verification

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2013 GMC Savana, 2013 GMC RV Cutaway, 2013 GMC Cutaway, 2013 Chevrolet RV Cutaway, and 2013 Chevrolet Express. 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 the satellites. It is also necessary to inform the OnStar® Call Center advisor that this call is for vehicle diagnostic purposes.

  1. Ignition ON, observe the GPS signal status indicator for at least 10 seconds with a scan tool. The indicator should display Yes.
    • If the indicator does not display Yes, refer to Circuit/System Testing below.
  2. Call and verify the OnStar advisor has received the GPS data.
    • If the advisor did not receive the GPS data and the call was a "fail to voice", contact the GM Technical Assistance Center.
    • If the advisor did not receive the GPS data and the call was not a "fail to voice", refer to Circuit/System Testing below.
  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 vehicle communication interface module.
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