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:
DTC B3883
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 Descriptor
DT
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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