Three-Way Calling
Three-way calling must be supported on the cell phone and enabled by the wireless service carrier.
1. While on a call, press 
.
2. Say “Three-way call.”.
3. Use the dial or call command to dial the number of the third party to be called.
4. Once the call is connected,
press to link all callers
together.
See also:
When to Inspect the Engine Air Cleaner/Filter
Inspect the air cleaner/filter at the scheduled maintenance intervals and replace
it at the first oil change after each 80 000 km (50,000 mi) interval. See Maintenance
Schedule for more info ...
OnStar®
OnStar® uses several innovative technologies and live
advisors to provide a wide range of safety, security,
navigation, diagnostics, and calling services. ...
Underbody Maintenance
Use plain water to flush dirt and
debris from the vehicle's underbody.
Your dealer or an underbody car
washing system can do this. If not
removed, rust and corrosion can
develop. ...