Circuit/System Verification

WARNING: This page is about a different car, the 2016 Buick LaCrosse. However, it is still accessible from the selected car via links, so may be relevant.

NOTE:

It is necessary to have the vehicle in a quiet, open outside area where a cellular call can be successfully placed and GPS data can be received from satellites.

Ignition ON.
Verify that DTC B2455 is not set.
- If DTC B2455 is set
  Refer to DTC B2455
- If DTC B2455 is not set
Verify that a successful OnStar voice command can be made.
- If your voice can not be heard clearly
  Refer to Circuit/System Testing.
- If your voice can be heard clearly
All OK.