Emergency Services require an
active, OnStar service plan
(excludes Basic Plan). With
Automatic Crash Response, built-in
sensors can automatically alert a
specially trained OnStar Advisor
who is immediately connected in to
the vehicle to help.
Press for a priority connection to
an OnStar Advisor w
Valve Measurement and Reconditioning Overview
Proper valve service is critical to engine performance. Therefore, all
detailed measurement procedures must be
followed to identify components that are out of specification.
If the measurement procedures reveal that the valve or valve seat must
b