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 P2122, P2123, P2127, P2128, or P2138
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 provide an overview of each diagnostic
category.
DTC Descriptors
DTC P2122
Symptoms - Displays and Gauges
NOTE: The following steps must be completed before using the symptom
diagnostic tables.
1. Before using the symptom diagnostic tables, perform the Diagnostic System
Check - Vehicle in
order to determine that there are no DTCs set, and that the control modules can
communicate via
the serial data li
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