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
General Description
A crankcase ventilation system is used to consume crankcase vapors in the
combustion process instead of venting
them to atmosphere. Fresh air from the intake system is supplied to the
crankcase, mixed with blow by gases and
then passed through a calibrated orifice into the inta
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