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Let us take care of your car care concerns—plus help you save on gas, oil, money, and time. That's the power of OnStar Vehicle Diagnostics.

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WE'VE SENT 100,000,000 DIAGNOSTIC EMAILS.
WHAT'S IN YOUR ONSTAR VEHICLE DIAGNOSTICS¹ REPORT
 
 
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We automatically run hundreds of diagnostic and maintenance checks on your vehicle's key operating systems and deliver a summary report right to your inbox every month. You'll find information divided into three main areas:

Diagnostic Information provides alerts for your key operating systems
(the ones you would see your GM dealer about if there were an issue):

 

Maintenance Information highlights areas that require periodic
attention to keep your vehicle running at its best:

 

Notification Information will let you know if there is a specific recall
for your vehicle (so you can easily schedule service with your GM dealer),
as well as important OnStar account information.

To ensure you receive your report, be sure to add OnStar Vehicle Diagnostics to your address book. Here's how.

IT'S EASY TO READ. We'll tell you what needs your attention using color-coded symbols:
 
No issue found
Action suggested
Immediate attention required
 
 
HOW TO MAKE THE MOST OF YOUR REPORT
 
 

It's important to read your report each month because there is always new information about your vehicle. You can track things like your engine and braking systems, oil life and tire pressure — and learn important tips.

Properly inflated tires
help improve fuel economy,
and tire rotation helps
maximize tire life.

Schedule service at your
GM dealer right from
your report — a
properly maintained vehicle
is a safer vehicle.

Monitor your vehicle's
oil life through your
report — it may not
need to be changed
every 3,000 miles.

 
ON-DEMAND DIAGNOSTICS
 
 

Also check your key systems right from the road. For example, if your check engine light comes on, just push your blue button and an Advisor will run a real-time diagnostics check
and provide the results.
Relax knowing this
service is available
whenever you
need it.

 

View frequently asked questions
about OnStar Vehicle Diagnostics.