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 B258A or B258E
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
Fuel Rail and Injectors Cleaning and Inspection
Special Tools
EN-47909 Injector Bore and Sleeve Cleaning Kit
EN-49245 Fuel Injector Seal Install/Sizer
EN-50791 Fuel Injector Nozzle Installer
EN-51105 Fuel Injector Seal Installer
For equivalent regional tools, refer to Special Tools.
1.
Remove and inspect the fuel rail insulator assemblies
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