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.
Push
to:
- Make a call, end a call, or answer an incoming call.
- 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:
- Verify account information or update contact information.
- Get driving directions. Requires the available Directions and Connections service plan.
- Receive On-Demand Diagnostics for a check on the vehicle’s key operating systems.
- Receive Roadside Assistance.
Push
to get a priority
connection
to an Emergency Advisor available
24/7 to:
- Get help for an emergency.
- Be a Good Samaritan or respond to an AMBER Alert.
- Get crisis assistance and evacuation routes.
See also:
Horn
To sound the horn, press the center pad on the steering wheel. ...
Engine Oil Messages
CHANGE ENGINE OIL SOON
When this message displays, it
means that service is required for
the vehicle. See your dealer.
See Maintenance Schedule and Engine Oil for more information.
When you res ...
Driving dynamics
The robust and dynamic CTS chassis infuses the new wagon with a great balance
of performance and luxury. It uses an independent short/long arm ( SLA) front
suspension system and a multi-link rear ...






