2001 Buick Century Owner's Manual - Page 126

OnStar System Limitations Complete limitations can be found on the Subscriber Services Agreement. OnStar Service is: D available in the 48 contiguous United States, Alaska, Hawaii and Canada; D available when the vehicle is within the operating range of a cellular provider; D subject to limitations caused by atmospheric conditions, such as severe weather or topographical conditions, such as mountainous terrain; D subject to cellular carrier equipment limitations. Global positioning capabilities used to deliver OnStar Service will not be available if satellite signals are obstructed. OnStar will not function if the vehicle's battery is discharged or disconnected. It may also be inoperative if the vehicle is in an accident and the OnStar or vehicle electrical system components are damaged. Safety and security services are provided by existing governmental emergency service providers. OnStar will use reasonable efforts to contact the appropriate emergency service provider and request assistance but cannot promise that they will respond to the call in a timely manner or at all. 2-56