See also:

Receiving a Call
When an incoming call is received, the audio system mutes and a ring tone is heard in the vehicle. Press to answer the call. Press to ignore a call. ...

Running the Engine While Parked
It is better not to park with the engine running. But if you ever have to, here are some things to know. CAUTION: Idling the engine with the climate control system off could allow dangerous exha ...

Add-on Electrical Equipment
The OnStar system is integrated into the electrical architecture of the vehicle. Do not add any electrical equipment. See Add-On Electrical Equipment. Added electrical equipment may interfer ...