Vehicle Diagnostics† is a tool that monitors your vehicle’s key operating systems and provides you with regular updates about your vehicle’s health. Those vehicle health updates are sent to your dealer to alert them when your vehicle needs service. When that time comes, your dealer will contact you to schedule an appointment with Certified Service. With Vehicle Diagnostics, you’re always connected - so you can drive more and worry less.
If you’re on the road and your “check engine” light or a vehicle alert pops up, OnStar may be able to help. Just push your blue OnStar button and ask the Advisor to run an On-Demand Diagnostics check. The Advisor can explain what steps you might need to take to resolve any potential issues, including offering Roadside Assistance or locating the nearest Certified Service dealer. On-Demand Diagnostics is included in the Remote Access, Connected Vehicle, Essentials, and Premium plans.
For enrolled Members, Vehicle Diagnostics is a powerfully simple way to help keep you aware of what’s going on under the hood. It offers peace of mind by checking in with you every month or in real time to help make sure your vehicle is ready for the road. There are two major features:
Time for a tire rotation? A tune-up? A new air filter? You’ll always know because OnStar will notify your preferred dealer when it’s time, and they’ll contact you to schedule an appointment. Your vehicle is self-diagnosing so you can enjoy the experience of driving.
Download the all-new myChevrolet, myBuick, myGMC, or myCadillac mobile app† and use your smartphone to manage your vehicle. Monitor your vehicle’s tire pressure,† oil life, and fuel level; lock or unlock doors;† remote-start the engine;† or search for destinations and send directions to your vehicle’s Navigation System† — all from your smartphone.
Includes a 4-tire rotation, Multi-Point Vehicle Inspection, and free of additional costs for new owners and lessees.
Scheduling service is quick and easy. Make your next appointment online by locating a Certified Service dealer near you.
Diagnostic capabilities vary by model and plan. Message and data rates may apply. Requires contact method on file and enrollment to receive alerts. Not all issues will deliver alerts. See onstar.com for details and limitations.
On-Demand Diagnostics capabilities vary by model and plan. See onstar.com for details and limitations.
Available on select Apple and Android devices. Service availability, features and functionality vary by vehicle, device and the plan you are enrolled in. Terms apply. Device data connection required. See onstar.com for details and limitations.
Vehicle must be equipped with Tire Pressure Monitoring System. Excludes spare tire.
Requires automatic door locks.
Requires factory-installed and enabled remote start.
Requires paid plan and properly equipped vehicle. Mobile app functionality is available on select devices and requires data connection. Map coverage available in the U.S., Puerto Rico and Canada. See onstar.com for details and limitations.
New owners and lessees for model year vehicles from 2019-2021. Maintenance visit must occur within first year of vehicle delivery. Does not include air filters. See dealer for other restrictions and complete details.
1. Requires paid plan, working electrical system, cell reception, GPS signal, armed GM factory-installed theft-deterrent system, contact method on file and enrollment to receive alerts. Additional messaging and data rates may apply. Services are intended to assist with vehicle recovery and do not prevent theft or protect against damage or loss. See onstar.com for details and limitations.