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 vehicle is equipped with the Tire Pressure Monitoring System. If a diagnostics check is needed between e-mails, push 
, and an Advisor can run a check.
See also:
Stopping and Resuming Playback
To stop playing a DVD without turning off the system, do one of the following:
• Press on the remote control.
• Press the softkey under the stop or the play/pause icons displayed on the radio.
...
Power Door Locks
If available, the switches are on the front doors.
: Press to unlock the doors.
: Press to lock the doors. ...
Brake Fluid
The brake master cylinder reservoir is filled with DOT 3 brake fluid as indicated on the reservoir cap.
See Engine Compartment Overview on page 10‑6 for the location of the reservoir.
There ...