See also:

Compass Variance
Compass variance is the difference between earth’s magnetic north and true geographic north. The mirror is set to zone eight upon leaving the factory. It will be necessary to adjust the compass ...

Using the Tire Sealant and Compressor Kit without Sealant to Inflate a Tire (Not Punctured)
To use the air compressor to inflate a tire with air only and not sealant: If a tire goes flat, avoid further tire and wheel damage by driving slowly to a level place. Turn on the hazard wa ...

How OnStar Service Works
: This blue button connects you to a specially trained OnStar advisor to verify your account information and to answer questions. : Push this red emergency button to get priority help fro ...