Buick Regal 2018-2026 Service Manual / General Information / Waterleaks
Buick Regal: Waterleaks
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Diagnostic Information and Procedures
WATERLEAK TEST PREPARATION
GM vehicles are designed to operate under normal environmental
conditions.
The design criteria for sealing materials and components takes into
consideration the seali
Repair Instructions
BODY WATERLEAK REPAIR
WARNING: If the vehicle interior is exposed to moisture and becomes
soaked up to
the level of the sensing and diagnostic module (SDM), the SDM and SDM
harness connector must be
SEE MORE:
Schematic Wiring Diagrams
HEADLIGHTS/DAYTIME RUNNING LIGHTS (DRL) WIRING SCHEMATICS
Controls and Indicators
Halogen Lamps and Daytime Running Lamps (T4A)
Left LED Headlamp Power, Ground and Serial Data (T4L)
Left LED Low Beam Lamps, Cornering Lamp and Cooling Fan (T4L)
Left LED High Beam Lamps, and High Beam Spot (T4L)
All-Wheel Drive
Transfer Case
Under normal driving conditions,
transfer case fluid does not require
maintenance unless there is a fluid
leak or unusual noise. If required,
have the transfer case serviced by
your dealer.
Starter Switch Check
Warning:
When you are doing this
inspection, the vehicle could
move suddenl
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