OnStar Handsfree Calling (OHFC) Inoperative And OnStar Blue Button Keypress Is Now Receiving The Demo Message - keywords 05-08-46-006M blue button communication digital disabled message no OnStar OPC

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 OHFC may be inoperative as well as the demo message being heard when the OnStar® blue button is presssed.

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 02-08-46-007D. If so, follow bulletin directions.
3. If neither step 1 or 2 applies, contact General MotorsTechnical Assistance 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.