For 1990-2009 cars

# Unable To Connect In Laurel, Pulaski and Rockastle Counties, KY.Other Areas may have this same concern.

Subject: | Unable to Connect in Laurel, Pulaski and Rockcastle Counties, KY. Other area's may also have this same concern.

Models: | All OnStar Gen 6 or Gen 7 equipped vehicles

This PI was superceded to update to current information. Please discard PIC3549.

The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI.

### Condition/Concern:

Some Gen 6 or Gen 7 customers may report on an OnStar (Blue button) or Emergency (red button) key press it results in: progression tones (1 every 6 seconds), dropped or a voice only call. A possible cause could be the OnStar VCIM is latched onto the wrong cellular network provider.

### Recommendation/Instructions:

Ensure the Tech 2 is updated with the latest software version. Enter the OnStar Vehicle Communication Interface Module > Program digital Home SID/NID > Set the SID value to 00001, save and exit the menu. DO NOT change the NID setting unless directed by OnStar or General Motors Technical Assistance.

Please follow this diagnostic or repair process thoroughly and complete each step. If the condition exhibited is resolved without completing every step, the remaining steps do not need to be performed.