See also:

Obstacle Detection Features
A warning chime will sound and the liftgate will automatically reverse direction to the full closed or open position if an obstacle is encountered during a power open or close cycle. After removing th ...

Safety
Standard safety features include: Four-wheel antilock brakes Electronic stability system Side curtain and side-impact airbags ...

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. ...