Buick Regal 2018-2025 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 P0455
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
Use of Room Temperature Vulcanizing (RTV) and Anaerobic Sealant
Cleaning Mating Part Surfaces for RTV Joints
RTV sealant depends greatly on adhesion to the mating parts in order to form
and maintain a robust sealed joint. As
with any adhesion system, proper surface preparation of the bonded parts is
extremely important to ensure good
adhesion over the life of
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