Service update

Bulletin number

15663

Component

Electrical system: wiring

Summary

15663 - service update. This bulletin provides a service procedure to relocate a wire circuit within the onstar connector on certain vehicles. These vehicles lack a ground in the microphone return path, which results in the voice recognition becoming inoperable when the vehicle is in retained accessory (rap) or accessory power mode. In addition, the hands-free voice quality can be degraded. The onstar functions are not impacted by this condition.

Owners of these vehicles have filed 60 complaints in the electrical category.