Buick Regal: Diagnostic Information and Procedures

 DTC B123E

Diagnostic Instructions Perform the Diagnostic System Check prior to using this diagnostic procedure: Diagnostic System Check - Vehicle Review the description of Strategy Based Diagnosis: Strategy Based Diagnosis An overview of each diagnostic category can be found here: Diagnostic Proced

 OnStar Description and Operation (UI3)

The Emergency Road Assistance Global Navigation Satellite System (ERA GLONASS) consists of the following components: Telematics communication interface control module Telematics two button assembly Microphone Cellular antenna GPS antenna Back up battery Backup speaker This system also inte