Buick Regal 2018-2026 Service Manual / HVAC & Restraints
Buick Regal: HVAC & Restraints
- Heating, Ventilation, and Air Conditioning
- Specifications, Visual Identification
- Diagnostic Information and Procedures
- Repair Instructions
- Special Tools and Equipment
- HVAC - Automatic
- HVAC - Manual
- Seat Belts
- Supplemental Inflatable Restraints
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Specifications, Visual Identification
SPECIFICATIONS
FASTENER SPECIFICATIONS
Single Use Non-Threaded Fasteners/Components
NOTE:
All fasteners/components listed in this table MUST BE DISCARDED and replaced
with
NEW after removal.
Applicat
Diagnostic Information and Procedures
LEAK TESTING
Special Tools
GE-41447 A/C Tracer Dye-Box of 24
GE-42220 Universal 12V Leak Detection Lamp
GE-43872 Fluorescent Dye Cleaner
GE-50078 Electronic Leak Detector
GE-50744 R-1234yf PAG O
SEE MORE:
DTC B25F8 or B25F9
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
Cylinder Leakage Test
Special Tools
EN 35667-A Cylinder Head Leakdown Tester
For equivalent regional tools, refer to Special Tools.
NOTE: A leakage test may be performed in order to measure
cylinder/combustion chamber
leakage. High leakage may indicate one or more of the following:
Worn or burnt valves
Broken valve s
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