The customer concern may have been due to a lack of cellular service in a given area or a failure in the National Cellular Network infrastructure that has since been corrected.
Step | Action | Yes | No | ||||||
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Schematic Reference: OnStar Schematics Connector End View Reference: Cellular Communication Connector End Views | |||||||||
1 | Did you perform the Cellular Communication Diagnostic System Check? | Go to Step 2 | |||||||
2 | Attempt to honk the horn, operate the lights and lock or unlock the doors on the vehicle. Does the applicable system operate properly? | Go to Step 3 | Go to
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3 |
Important: It is necessary to inform the OnStar® Call Center advisor that this call is for vehicle diagnostic purposes.
Was the attempt successful? | Go to Diagnostic Aids | Use the scan tool to access the STID and ESN and contact the General Motors Technical Assistance Center |