See also:

Using the Dial Command
1. Press and hold for two seconds. The system responds with “Ready” followed by a tone. 2. Say “Dial”. The system responds with “Dial using <phone name>”. “Number please” ...

Place a Call Using a Stored Number
1. Push . System responds: “OnStar ready.”. 2. Say “Call <name tag>.” System responds: “OK, calling <name tag>.” ...

Check Engine Light
A computer system called OBD II (On-Board Diagnostics-Second Generation) monitors operation of the fuel, ignition, and emission control systems. It ensures that emissions are at acceptable levels ...