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Tahoe / Yukon Service Manual

Backup Battery Reset

Cellular, Entertainment, and Navigation | Diagnostic Information and Procedures | Document ID: 5838635 The Backup Battery Timer Reset needs to be performed anytime a new OnStar backup battery is replaced. The OnStar module monitors certain elements of the backup battery (including age) and failure to perform this reset procedure could result in future needless replacement of the backup battery.

  1. Using a scan tool, in the K73 Telematics Communication Module under Configuration/Reset Functions perform the Backup Battery Timer Reset procedure.
  2. Follow the scan tool directions to complete the procedure.
  3. At the end of the procedure clear any DTC’s