Using the “Dial” or “Call” Command
1. Press and hold 
for two seconds.
2. Say “Dial” or “Call.” 3. Say the entire number without pausing, or say the name tag.
Once connected, the person called will be heard through the audio speakers.
See also:
Power Mirrors
Vehicles with outside power mirrors have controls located on the driver door.
To adjust each mirror:
1. Press (A) or (B) to select the driver or passenger side mirror.
2. Press the arrows on the ...
Brake Adjustment
Every time the brakes are applied, with or without the vehicle moving, the brakes adjust for wear. ...
New for 2010
GM has dropped the long-running 6.0-liter V-8 engine from the Sierra lineup,
leaving the powerful 6.2-liter V-8 for heavy towing needs. The rest of the
Sierra's eight-cylinder lineup benefits from ...