GMC Sierra Owners Manual
OnStar OverviewOnStar / OnStar Overview
If equipped, this vehicle has a comprehensive, in-vehicle system that can connect to a live Advisor for Emergency, Security, Navigation, Connection, and Diagnostic Services.
The OnStar system status light is next to the OnStar buttons. If the status light is:
Solid Green: System is ready.
Flashing Green: On a call.
Red: Indicates a problem.
Push or call 1-888-4-ONSTAR (1-888-466-7827) to speak to an Advisor.
Give OnStar Hands-Free Calling voice commands.
Give OnStar Turn-by-Turn Navigation voice commands.
Requires the available Directions and Connections service plan.
Push to connect to a live Advisor to:
Get driving directions. Requires the available Directions and Connections service plan.
Receive On-Demand Diagnostics for a check on the vehicles key operating systems.
Receive Roadside Assistance.
Push to get a priority
Get help for an emergency.
Be a Good Samaritan or respond to an AMBER Alert.
Get crisis assistance and evacuation routes.