Circuit/System Verification
WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2008 GMC Yukon XL, 2008 GMC Yukon, 2008 Chevrolet Tahoe, 2008 Chevrolet Suburban, and 2008 Chevrolet Avalanche. 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.
- 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 above.
- 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 above.
- 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 CIM.