The OnStar system does not start or there is no diagnostic communication with the system
Read the instructions below then start the fault diagnostic procedure.
Symptom: The OnStar system does not start or there is no diagnostic communication with the system.
| The OnStar system does not start or there is no diagnostic communication with the system |
Fault symptoms
The OnStar system does not start or there is no diagnostic communication with the system.Conditions
No trouble codes stored in the car for the current fault symptom.Diagnostic help
In one of the units (OIM and VCIM), one of the communication, power supply or ground leads can be faulty.This project is supported by memberships and donations. If you use this site, please consider Joining SCNA and/or making a donation.
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