See also:

Call Waiting
Call waiting must be supported on the cell phone and enabled by the wireless service carrier. - Press to answer an incoming call when another call is active. The original call is placed on hold. ...

Capacities and Specifications
Engine Specifications ...

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 ...