See also:

Hazard Warning Flashers
(Hazard Warning Flasher): Press this button, on the center of the instrument panel, to make the front and rear turn signal lamps flash on and off. This warns others that you are having trouble. ...

Fluids
Proper fluid levels and approved fluids protect the vehicle’s systems and components. See Recommended Fluids and Lubricants on page 11‑12 for GM approved fluids. • Engine oil and windshield ...

New for 2011
The Sierra Hybrid gets GM's OnStar 9.0 telematics system that GM says provides better voice recognition. GM also said they have worked to cut down on the amount of wind noise occupants hear. ...