Chevrolet Sonic Owner's Manual: 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.
Press 
or call 1-888-4-ONSTAR (1-888-466-7827)
to speak to an Advisor.
Press 
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.
Press 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 of the vehicle’s key operating systems.
- Receive Roadside Assistance.
Press the OnStar Emergency button 
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 assistance in severe weather or other crisis and evacuation routes.
OnStar
...
OnStar Services
Emergency
With Automatic Crash Response, the built-in system can automatically connect
to help in most crashes, even if help cannot be requested.
Press to connect to an Emergency
Advisor. GPS t ...
Other materials:
If the Off Indicator Is Lit for an Adult-Size Occupant
If a person of adult size is sitting in the front outboard passenger seat, but
the off indicator is lit, it could be because that person is not sitting properly
in the seat. Use the following steps to allow the system to detect that person and
enable the front outboard passenger frontal airb ...
Brake Fluid
The brake/clutch master cylinder reservoir is filled with DOT 3 brake fluid as
indicated on the reservoir cap. See Engine Compartment Overview for
the location of the reservoir.
There are only two reasons why the fluid level in the reservoir might go down:
The fluid level goes down ...
Radiator Mounting Stud Repair
Repair Procedure
Note: If the radiator is leaky, replace it. Refer to Radiator
Replacement.
Pressure test the cooling system. Refer to Cooling System Leak Testing.
Grind the fracture surface (1) with a proper tool.
Drill a hole in the cente ...
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