PIT5389

Bulletin No.: PIT5389
Date: Mar-2015
Subject:
Diagnostic Tip: Gen10 OnStar Unable To Connect Or Connects Failed To Voice
Models:
2015 All GM Passenger Car and Light Duty Trucks With OnStar Gen10
Condition/Concern
A customer may comment that an OnStar (Blue) button, emergency (red) button or/and HFC (call answer/end button) key press results in: Cellular messages,
progression tones (1 every 6 seconds), dropped calls or no data on the call with OnStar (failed to voice).
Recommendation/Instructions
Cycle power to the VCIM and place a test call to OnStar. If the concern is still present, install the test antenna and retest operation.
If the above steps do not correct the condition, record the following information and contact GM Technical Assistance.
From GDS2 Record
IDENTIFICATION INFORMATION:
End Model Part Number:
Mobile Equipment Identifier:
OnStar Customer Identifier:
Module Generation Identifier:
GSM Network Code:
Off Board Navigation:
Mobile Identification Number
Mobile Directory Number:
SIGNAL STRENGTH DATA:
GSM Signal Strength:
Public Land Network Number:
Perform an outbound OnStar personal call
Results
OnStar key press
Results:
Can the vehicle receive a call?
Results:
–
When did the issue start (Date and Time)?
–
Has Service Worked in this location before (Y/N):
or If yes, when and where it last worked?
–
Does it occur in multiple locations?
–
Other vehicle's in the area experiencing the same problem (Y/N):
Note: A possible cause could be a lack/limited cellular coverage, or an outage in the area.
1
GM bulletins are intended for use by professional technicians, NOT a "do-it-yourselfer". They are written to inform these technicians of conditions that may
occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have the equipment, tools,
safety instructions, and know-how to do a job properly and safely. If a condition is described, DO NOT assume that the bulletin applies to your vehicle, or that
your vehicle will have that condition. See your GM dealer for information on whether your vehicle may benefit from the information.
WE SUPPORT VOLUNTARY TECHNICIAN CERTIFICATION
2