For 1990-2009 cars

# Onstar System is Unable to Send or Receive Cellular Phone Calls and Cannot Connect to Call Center

Subject: | OnStar® System is Unable to Send or Receive Cellular Phone Calls and Cannot Connect to Call Center (Perform "Preferred System Setting" Procedure)

Models: | 2002 L-Series vehicles equipped with OnStar®(RPO UE1)

| 2002 VUE vehicles equipped with OnStar®(RPO UE1)

### Condition

Some vehicles may be unable to send or receive cellular phone calls and cannot connect to the OnStar® Call Center following a disconnected ("dropped") cellular phone call during an OnStar® configuration attempt. When calling the OnStar® Call Center, an "unable to contact OnStar" message will be heard. If any other message is heard, this bulletin does not apply.

### Cause

This condition may be caused by an internal software error.

### Correction

Use the following procedure to reset the OnStar® communications and interface module (CIM).

### OnStar®Communications And Interface Module (CIM) Reset Procedure

1. Perform the "Preferred System Setting" procedure found in the "OnStar Special Functions" menu of the scan tool.

1.1. | Highlight option line "B, then A"(if not already highlighted).

1.2. | Press "Enter" to put an asterisk next to the option (if the asterisk isn't already present).

1.3. | Press the "Save Options" key.

2. Once the "Preferred System Setting" procedure has been performed, move the vehicle outdoors and contact the OnStar Call Center to have the system configured.