Buick Regal 2018-2025 Service Manual / HVAC & Restraints / HVAC - Automatic
Buick Regal: HVAC - Automatic
SPECIFICATIONS
FASTENER TIGHTENING TORQUE SPECIFICATIONS
Reusable Threaded Fastener Tightening Specifications
NOTE: All fasteners listed in this table can be reused after removal.
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SCHEMATIC WIRING DIAGRAMS
HVAC WIRING SCHEMATICS
HVAC Module Power, Ground, Serial Data, and Subsystem References
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HVAC Controls
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A/C Compressor Controls
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Blower Motor
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Mode and Temperature Door Actuators
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Temperature Sensors
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Windshield and Sunload Sensors
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Heater Coolant Pump
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Diagnostic Information and Procedures
HVAC COMPONENT REPLACEMENT REFERENCE
DTC B0163
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.
Diag
DTC B0163, B0183, or B1405
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.
Diag
SEE MORE:
Symptoms - HVAC Systems - Automatic
NOTE: The following steps must be completed before using the symptom
tables:
1. Perform the Diagnostic System Check - Vehicle before using the HVAC System
Malfunction
procedure in order to verify that all of the following are true:
There are no DTCs set.
The control modules can communicate via
Heater and Air Conditioning Evaporator Case Replacement
Removal Procedure
1. Heater and Air Conditioning Evaporator and Blower Module - Remove.
2.
{ If equipped }Auxiliary Heater Core(2) - Remove.
3.
Heater Core(1) - Remove.
4.
Heater and Air Conditioning Evaporator Case Bolt(1) - Remove[5x].
5.
Heater and Air Conditioning Evaporator Case(1) - Re
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