Vehicle Mobile App

Find FAQ and support for the myChevrolet, myBuick, myGMC and myCadillac mobile apps

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Remote climate start often fails in '26 Lyriq
When I use the myCadillac app to try to remote start climate in my car, it usually fails. Other actions often take forever and fail, too. The dealer has looked at it and said to contact OnStar. I previously had a '24 Lyriq and it had the same problems - unreliability of remote actions. It doesn't seem to matter if the car is connected to my home WiFi or if I'm away from that. Pretty frustrating to not be able to come back to a warm car in our frigid Midwest winters despite having purchased a luxury car. I've been through several support tickets and basically lost faith that GM knows what it's doing.
sdc
New Contributor
8 days agoPlace Vehicle Mobile App
mycadillac
71Views
0likes
1Comment
App is not updating
My app hasn’t updated for 2 days now. It hasn’t changed the fuel level, miles, and tire pressure levels. Only thing working is my remote start and locking and unlocking of doors. I have already restarted my phone, uninstalled the app and reinstalled it, logged out and logged in, checked to see if my phone needed an update, and checked to make sure my onstar account was still active. What is going wrong with the app connecting to my vehicle????
MissKitty
New Contributor
16 days agoPlace Vehicle Mobile App
myChevrolet
125Views
0likes
3Comments
App hasn’t connected in over a month
My app will not connected to my 2025 Silverado. Can’t see diagnostics, can’t remote start. Pretty much useless. I’ve done everything they say to reset it but nothing works. Extremely disappointed
nicholls826
New Contributor
21 days agoPlace Vehicle Mobile App
myChevrolet
125Views
0likes
1Comment
MyBuick app
Both MyBuick and myGMC apps have lost connection to both vehicles and I have no controls. Is this an app issue or an issue with my vehicles?
dclemdog39
New Contributor
25 days agoPlace Vehicle Mobile App
mybuick
mygmc
121Views
0likes
5Comments
App will not let me do anything
My Buick App issues
luhringd
New Contributor
25 days agoPlace Vehicle Mobile App
mybuick
141Views
0likes
3Comments
My App Don't Have the Start Button...
So my 2021 Chevrolet Equinox has remote start but it does not show up on my app. All the other functions are there (unlock, lock, horn etc.) But my start button is not. How can I get it on my app??
Anthony88
New Contributor
26 days agoPlace Vehicle Mobile App
myChevrolet
77Views
0likes
1Comment
MyGMC app won't send remote commands
My app is working except it will not send remote commands. When I select lock, unlock or remote start it just says sending for a while and then I get an error message telling me "Unable to reach Sierra 2500HS. Use key to start manually and restore connection." I have reached out to Onstar and GM support multiple times with no resolution. Onstar is supposedly linked to my GM account and all looks fine but OnStar cannnot reach my vehicle. My Onstar button will let me call Onstar just find. HELP!!
Angelique_99762
New Contributor II
26 days agoPlace Vehicle Mobile App
mygmc
175Views
0likes
9Comments
FYI...Trailer Light Testing Is Back
To all community members, if you missed it, I have some good news. Back in March, OnStar removed the Trailer Light Testing feature from the mobile apps, which was a major headache for many of us. The Update: As of the last couple of weeks, the feature has officially returned! You can find it again under the Control Tab in both the myGMC and myChevrolet apps. What’s Next? I’m really hoping this means Climate Controls are next on the list to be restored. They were removed around the same time earlier this year, and with winter hitting hard, having that functionality back would be a lifesaver. Keep an eye on your apps and make sure you're running the latest update!
Construct94
New Contributor II
27 days agoPlace Vehicle Mobile App
myChevrolet
mygmc
24Views
0likes
1Comment
myChevrolet app
myChevrolet app won't start my car. I've shut my phone down, logged out of the app, deleted the app and reinstalled app. Still doesn't start my car.
Milo
New Contributor
29 days agoPlace Vehicle Mobile App
myChevrolet
41Views
0likes
1Comment
MYCHEVROLET app no longer showing real-time tire pressure
Why is MyChevrolet App no longer showing real-time status features like tire pressure, etc. with OnStar One plan purchased?
MAHarrington13
New Contributor
30 days agoPlace Vehicle Mobile App
myChevrolet
280Views
1like
7Comments

Related Support Article

Help: Vehicle Mobile App
How do I set up my vehicle mobile app? Follow these important steps to properly activate your vehicle mobile app. iPhone requires iOS 13.0 or later. Android smartphones require OS 4.0.3 or later. ...
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vehicle mobile app

Helpful Links

OnStar Vehicle Mobile App | OnStar Services
Download OnStar's vehicle mobile app and control remote commands & more right from your smartphone. Available for Chevrolet, ...
How to Use myChevrolet Mobile App | Vehicle Support
The myChevrolet mobile app enables you to use your smartphone to interact with your vehicle from wherever you are. You can remote start, unlock and lock your vehicle, view your fuel life and tire pressure, and more on properly equipped vehicles.
How to Use myCadillac Mobile App | Vehicle Support
The myCadillac mobile app enables you to use your smartphone to interact with your vehicle from wherever you are. You can remote start, unlock and lock your vehicle, view your fuel life and tire pressure, and more on properly equipped vehicles.
How to Use myGMC Mobile App | Vehicle Support
The myGMC mobile app enables you to use your smartphone to interact with your vehicle from wherever you are. You can remote start, unlock and lock your vehicle, view your fuel life, EV range and tire pressure, and more on properly equipped vehicles.
How to Use myBuick Mobile App | Vehicle Support
The myBuick mobile app enables you to use your smartphone to interact with your vehicle from wherever you are. You can remote start, unlock and lock your vehicle, view your fuel life and tire pressure, and more on properly equipped vehicles.