Compass Zone
The zone is set to zone eight. If you do not live in zone eight or drive out of the area, the variance needs to be changed to the appropriate zone.
To adjust for compass variance, use the following procedure:
See also:
Security Light
The security light should come on briefly as the engine is started. If the system
is working normally, the indicator light turns off. If it does not come on, have
the vehicle serviced by your de ...
Tire Designations
Tire Size
The following is an example of
a typical passenger vehicle
tire size.
(A) Passenger (P–Metric) Tire:
The United States version of
a metric tire sizing system.
The letter P as the ...
Diagnostics
OnStar Vehicle Diagnostics will perform a vehicle check every month. It will
check the engine, transmission, antilock brakes, and major vehicle systems. It also
checks the tire pressures, if the v ...