Proactive Alerts, a feature of OnStar Advanced Diagnostics, are designed to help predict specific types of potential performance degradation based on current vehicle data. New Proactive Alerts have been added to address parasitic drains that can lead to a dead 12V battery.
Proactive Alert Identifiers
Parasitic Drain Detection uses available vehicle data to determine if an excessive amount of battery capacity, measured in amp-hours, was drawn from the 12V battery while the vehicle was in Off mode. The new Proactive Alerts are:
| Proactive Alert Identifier | Description |
| SAC006 | TBD (future growth) |
| SAC007 | TBD |
| SAC008 | Severe Drain Detected on 12V Battery (suspected out-of-date software) |
| SAC009 | TBD |
The customer may provide the Proactive Alert Identifier. Otherwise, use the scan tool to select Vehicle Diagnostics > Vehicle Proactive Alerts to read the Proactive Alert Identifiers on the vehicle. (Fig. 1-3) Currently, no associated DTCs are stored in the vehicle.
Fig. 1
Fig. 2
Fig. 3
Repair Procedures
To find the Service Information procedures, search for the specific Proactive Alert Identifier, such as SAC008. (Fig. 4-5)
Fig. 4
Fig. 5
Customer and Dealership Messages
Customers must sign up for the service through OnStar to receive Proactive Alerts. Once enrolled, they may receive Push Notifications and Mobile Inbox messages through the myBrand App (Fig. 6) when a parasitic drain is detected. Additional Notification channels, such as e-mail and text messages, will be available in the future.
Fig. 6
For more information about the operation of Parasitic Drain Detection, refer to the appropriate Service Information under Diagnostic Overview, Starting Point, and Programming > Vehicle Diagnostic Information > Description and Operation > Proactive Alerts Description and Operation.
– Thanks to Brett Holsworth
