Buick Regal 2018-2025 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:
Cooling System Draining and Filling (GE 47716)
Special Tools
GE-26568 Coolant and Battery Fluid Tester
GE-42401 Radiator Cap and Surge Tank Test Adapter
GE-47716 Vac N Fill Coolant Refill Tool
Draining Procedure
WARNING: With a pressurized cooling system, the coolant temperature in
the radiator
can be considerably higher than the boiling p
DTC P0521, P0522, or P0523
DTC Descriptors
DTC P0521
Engine Oil Pressure Sensor Performance
DTC P0522
Engine Oil Pressure Sensor Circuit Low Voltage.
DTC P0523
Engine Oil Pressure Sensor Circuit High Voltage
Diagnostic Fault Information
1. Engine Oil Pressure Indicator Malfunction
Circuit/System Description
The engine oil pr
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