For service and parts needs, visit
your dealer. You will receive
genuine GM parts and GM-trained
and supported service people.
Genuine GM parts have one of
these marks:
California Proposition
65 War
Warning:
It can be dangerous to work on
your vehicle if you do not have
the proper knowledge, service
manual, tools, or parts. Always
follow owner's manual procedures
and consult the service manual
fo
Engine Coolant Indicators
The instrument panel cluster (IPC) shows the engine temperature on the
temperature gauge. The
value is sent on the data communication line from engine control module (ECM).
When the coolant
temperature is more than 128ºC (262ºF) IPC receives a discrete input f
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