See also:

Active Head Restraints
The vehicle has an active head restraint system in the front seating positions. These automatically tilt forward to reduce the risk of neck injury if the vehicle is hit from behind. ...

Interior
Like the previous Seville, five occupants fit inside the STS, which has soft all-leather seats. Heated and ventilated seating is an option. The headliner and pillars are covered in woven fabric. G ...

Security
OnStar provides services like Stolen Vehicle Assistance, Remote Ignition Block, and Roadside Assistance, if the vehicle is equipped with these services. OnStar can unlock the vehicle doors remotely, ...