Handsfree Calling Inop With Demo Message On OnStar Keypress - keywords 05-08-46-006N blue button communication digital disabled message no OPC operation vs3bgen6 vs3bgen7

This PI was superseded to update model years and bulletin reference information. Please discard PIC4564.

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

It has been determined that all vehicles that have Gen 6.X (Gen 6.0, 6.05, 6.06, 6.05R, 6.11, 6.15, 6.4) or 7.X (7.0, 7.04, 7.045, 7.0L, 7.1L) could have a concern where the OnStar® Handsfree Calling (OHFC) may be inoperative as well as the demo message being heard when the OnStar® blue button is pressed.

This is due to the module being reset to its default configuration through an internal trigger in the VCIM or by a call into the vehicle by OnStar® to disable the system for an identified concern.

Important: Do not perform a Set-up new OnStar®/VCIM setup on this vehicle as they may cause the concern. If a Set-up new OnStar®/VCIM setup was not performed, perform the following diagnostics:

1. Verify that the OnStar® account was not canceled/deactivated where this may be a normal condition.
2. Check to see if the customer received a letter referencing B02-08-46-007C. If so, follow bulletin directions.
3. If neither step 1 or 2 applies, contact the General Motors Technical Assistance Center (GMTAC) for further 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.