Buick Regal 2018-2026 Owners Manual / OnStar
Buick Regal: OnStar
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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
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Throttle Actuator Control (TAC) System Description
The engine control module (ECM) is the control center for the throttle
actuator control (TAC) system.
The ECM determines the driver's intent based on input from the accelerator pedal
position sensors, then
calculates the appropriate throttle response based on the throttle position
sensors. The
DTC B0193
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 Descriptors
D
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