Buick Regal 2018-2026 Owners Manual / OnStar
Buick Regal: OnStar
READ NEXT:
OnStar Overview
Voice Command Button
Blue OnStar Button
Red Emergency Button
This vehicle may be equipped with a
comprehensive, in-vehicle system
that can connect to an OnStar
Advisor for Emergency, S
Emergency
Emergency Services require an
active, OnStar service plan
(excludes Basic Plan). With
Automatic Crash Response, built-in
sensors can automatically alert a
specially trained OnStar Advisor
who is immed
SEE MORE:
DTC B389A
Diagnostic Instructions
Perform the Diagnostic System Check - Vehicle prior to using this
diagnostic procedure.
Review Strategy Based Diagnosis for an overview of the diagnostic
approach.
Diagnostic Procedure Instructions provides an overview of each
diagnostic category.
DTC Descriptor
DT
Evaporative Emission System Diagnosis
Special Tools
CH-44284-2 Fuel Flapper Door Holder
EN-41413-VLV EVAP Service Port Vent Fitting
GE-41415-60 Engine Induction System Leak Test Adapter/Capless Fuel Fill
Adapter
Operating Instructions for the Evaporative Emission System Tester
Vehicle Setup
WARNING: Refer to Fuel and Evaporative
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