Ask an OnStar Question

Ask an OnStar Question | Graff Mt. Pleasant Techs are Experts in OnStar

At Hank Graff Chevrolet in Mount Pleasant, we are pleased to provide our customers with OnStar. OnStar gives drivers a sense of security and connectivity while they are on the road. This security comes from such features as Roadside Assistance, Navigation, Hands-Free Calling, and Automatic Crash Response.

With so many features, it can be hard to learn how to work every single one of them. To help you understand your OnStar Auto Security, we encourage you to contact one of our tech experts at Hank Graff – Mt. Pleasant.

We know the ins and outs of OnStar, and can quickly and thoroughly answer any questions you might have. To contact us, click the button to the left or give us a call at (989) 773-3937.

Page Summary:

What is OnStar?

  • A GM auto security system that provides customers with a range of auto security and safety features.

What auto security and safety features does OnStar offer?

  • Turn-by-Turn Navigation
  • Hands-Free Calling
  • Remote Diagnostic System
  • Automatic Crash Response
  • Roadside Assistance
  • SO much more!

If I have an OnStar question, whom do I contact?

  • Our OnStar experts can be reached via the form on this page or by calling (989) 773-3937.


OnStar’s Automatic Crash response feature is your backup plan should you be involved in an accident.If a crash occurs, a specially trained Emergency Advisor will be immediately connected to your vehicle. Your advisor will send emergency responders to your exact GPC location if you request help or can’t answer.

You can also reach this emergency service by pushing the red SOS button. OnStar gives you 24/7 access so that you can be easily taken care of in a crisis. No matter what happens on the road, OnStar is your link to emergency service providers.



OnStar’s Security Protection is a great way to protect your vehicle - especially with the stolen vehicle assistance feature. If you ever find yourself in a situation where your vehicle has been stolen, OnStar will work with the police in an effort to recover it.

If you find yourself stranded somewhere with an empty gas tank or a flat tire, Roadside Assistance can be reached with the push of your OnStar button. Once you’ve pushed the button, OnStar will contact a nearby car dealership, towing service or gas station, and they will send them your exact location.



With the Navigation Assistance feature, you can plan out your route ahead of time and send it to your vehicle via the OnStar Turn-by-Turn navigation and eNav. The Turn-by-Turn Navigation can easily connect you to your destination.

The eNav feature is designed for convenience since it completely eliminates the need to manually enter an address while driving. Instead, you can program and send directions to your vehicle before you get behind the wheel.

Harness the power of MapQuest with eNav and enjoy the world’s easiest road trip.



With OnStar’s Hands-Free Calling, you’ll be able to stay connected with the outside world and focused on the road ahead. All you need to do is push the Voice Command button to make or take a call. Once you’ve pushed the button and said the phone number or the stored name of your contact, OnStar will connect you.

With OnStar RemoteLink mobile app, you’ll be able to have reliable and easy calling on the go. Simply remotely connect to your vehicle with the mobile app and you’ll be able to control certain features of your vehicle. This includes viewing real-time diagnostic information, and more.



OnStar’s Diagnostics feature is a great way to know what exactly is going on with your vehicle. Diagnostic information is sent to you monthly via email reports. This ensures you know what’s going on with your vehicle in easy to understand language and images.

This feature also gives you the option to run a diagnostic report while you’re on the road – all you have to do is push a blue button and an Advisor will contact you and conduct a real-time check for you. While the diagnostic reports can be accessed at any time, OnStar will automatically run hundreds of checks and maintenance reviews on your vehicle’s main operating systems. For questions and concerns, contact us via the form!

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