Buick Regal: Steering & Driveline & Axle

 OnStar Description and Operation (UE1 without IOB/IO6)

This OnStar system consists of the following components: Telematics communication interface control module OnStar three button assembly Microphones Cellular antenna Navigation antenna Back up battery WiFi Support TTY (Teletypewriter) This system also interfaces with the factory install

 Symptoms - HVAC Systems - Automatic

NOTE: The following steps must be completed before using the symptom tables: 1. Perform the Diagnostic System Check - Vehicle before using the HVAC System Malfunction procedure in order to verify that all of the following are true: There are no DTCs set. The control modules can communicate via