Buick Regal 2018-2025 Owners Manual / Climate Controls / Climate Control Systems
Buick Regal: Climate Control Systems
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Dual Automatic Climate
Control System
The climate control buttons on the center stack and on the climate control
display are used to adjust the heating, cooling, and ventilation.
Center Stack Climate Controls
Driver and Passenger
Temp
Climate Control Status Display
The climate control status display
appears briefly when the center
stack climate controls are adjusted.
The air delivery mode can be
adjusted on the climate control
display.
Climate Control Influenc
Rear Window Defogger
: Press to turn the rear window
defogger on or off. An indicator light
on the control comes on to show
that the rear window defogger is on.
The rear window defogger only
works when the engine is runn
SEE MORE:
OnStar Microphone Malfunction (IOR/IOU/IOT/IOS)
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
Cooling System Leak Testing (Pressure Test)
Special Tools
GE-42401-A Radiator Cap and Surge Tank Test Adapter
For equivalent regional tools, refer to Special Tools.
WARNING: Under pressure, the temperature of the solution in the
radiator can be
considerably higher, without boiling. Removing the radiator cap while the engine
is hot (pressure
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