OnStar®
OnStar OverviewEngine Oil
To ensure proper engine performance and long life, careful attention must be
paid to engine oil.
Following these simple, but important steps will help protect your investment:
Always use engine oil approved to the proper specification and of the proper
viscosity grade. See “Selecting the R ...
Additional Factors Affecting System Operation
Safety belts help keep the passenger in position on the seat during vehicle maneuvers
and braking, which helps the passenger sensing system maintain the passenger airbag
status. See “Safety Belts” and “Child Restraints” in the Index for additional information
about the importance of proper res ...
Tire Designations
Tire Size
The following is an example of a typical passenger vehicle tire size.
(1) Passenger (P-Metric) Tire: The United States version of a metric tire sizing
system. The letter P as the first character in the tire size means a passenger vehicle
tire engineered to standards set by the U. ...