Buick Regal 2018-2026 Owners Manual / Lighting
Buick Regal: Lighting
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Exterior Lamp Controls
The exterior lamp control is on the
instrument panel to the left of the
steering column.
There are four positions.
: Turns the exterior lamps off and
deactivates the AUTO mode. Turn
to again to r
Automatic Headlamp
System
When the exterior lamp control is
set to AUTO and it is dark enough
outside, the headlamps come on
automatically.
There is a light sensor on top of the
instrument panel. Do not cover the
sensor; othe
SEE MORE:
DTC B1025-B1135 (UQA without IO5/IO6)
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.
Refer to Diagnostic Procedure Instructions provide an overview of each
diagnostic category.
DTC Descr
Brake Rotor Assembled Lateral Runout Measurement
Special Tools
GE-571-B Hub and Wheel Runout Gauge
For equivalent regional tools, refer to Special Tools.
WARNING: Refer to Brake Dust Warning.
NOTE:
Brake rotor assembled lateral runout (LRO) exceeding the maximum
allowable specification can cause thickness variation to develop in the
brake roto
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