2001 GMC Sierra 1500 Pickup Owner's Manual - Page 160

OnStar Services Button: Press this button once to contact an advisor who will be able to assist you with these services. If you are not quickly connected, the system will automatically reset and redial. This ensures connection to the center; there is no additional action required. Press the Call Answer/End button to cancel the automatic redial. Emergency Button: In an emergency situation, press the emergency service button. Upon receiving the call, an advisor at the center will locate your vehicle and assess the situation. If necessary, the advisor will alert the nearest emergency service provider. Call ANSWER/END Button: Use this button to answer a call. (If you are receiving a call, the audio system will mute, and the ring will be heard). Press this button at the end of a call to disconnect and return the audio system to its previous settings. This button will also cancel a call if one of the buttons is accidentally pressed or if the automatic redial function is activated. Volume Control: You can control the volume of the OnStar System using either the volume control knob on the radio or using the steering wheel controls, if equipped. Telltale Light: This light will indicate the status of the system. A solid green light will come on when you start the vehicle to let you know that the system is on and is ready to make or receive calls. If the light blinks green it means that an incoming or outgoing call is in progress. Press the Call ANSWER/END button if you notice the light blinking and you are not on a call. The light will be red in the event of an OnStar system malfunction. If this occurs press the OnStar button to attempt to contact an advisor. If the connection is made, the advisor will assist you with steps to take to make sure that the system is functioning properly. If you cannot contact the advisor, take your vehicle to your dealership as soon as possible for assistance. 2-77