Buick Regal 2018-2025 Owners Manual / Keys, Doors, and Windows / Interior Mirrors
Buick Regal: Interior Mirrors
Interior Rearview Mirrors
Adjust the rearview mirror for a clear view of the area behind your vehicle.
If equipped with OnStar, the vehicle may have three control buttons at the bottom of the mirror. Do not spray glass cleaner directly on the mirror. Use a soft towel dampened with water.
Automatic Dimming Rearview Mirror
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The rearview mirror automatically dims to reduce the glare of the headlamps from behind. This feature comes on when the vehicle is started.
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Windows
Warning:
Never leave a child, a helpless
adult, or a pet alone in a vehicle,
especially with the windows
closed in warm or hot weather.
They can be overcome by the
extreme heat and suffer
permanent i
Roof
Sunroof
If equipped, the sunroof only
operates when the ignition is on or
in ACC/ACCESSORY, or when
Retained Accessory Power (RAP) is
active.
Sunroof Switch
The vehicle may have one of two
different
SEE MORE:
DTC B305C
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
Harsh Garage Shift
"N" to "D"
ATF Level/Condition
TCM
Shift Cable Adjustment
Valve Body
"N" to "R"
ATF Level/Condition
TCM
Shift Cable Adjustment
Valve Body
ERRATIC SHIFT
Erratic Shifting
Output Speed Sensor (NOUT)
TCM
SLIPS IN DRIVE OR NO DRIVE
No Move or Slip in "D"
ATF Level/Condition
TCM
Shift
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