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You must use the same email address you provided the Dealer when you bought your vehicle, or that you provided the Advisor during your Welcome Call. That means you may have to create a new account if you do not already have a profile using that email address.  
If you already have a sign-in (email address and password) with OnStar or other GM services, such as your GM Account (chevrolet.ca, buick.ca, gmccanada.ca or cadillaccanada.ca; previously Owner Centre), the OnStar Guardian® app^†, etc., you should use that to sign in. 
If you don’t use the correct email address, your account will not link to your new vehicle or services. 

If your correct vehicle isn’t appearing in the app, it is likely an account linking issue. This may be because your account is linked to an old email or you didn’t link your account when you set up your profile.  It could also be because you recently made changes to your OnStar account (such as renewing or upgrading, consolidating multiple accounts, etc.) and the changes have not yet been synched. You can try logging out of and back into the app. If you’re still having trouble, call an OnStar Advisor at (877) 558-8352 for help fixing this issue.

If you own multiple vehicles across brands, you can download any app you prefer. You’ll be able to manage all vehicles on the account using the Product Selector in the Account menu. Tap the initials in the top-right corner of the mobile app’s Home screen to access the Product Selector and other account features. 

This signifies the oil life monitor system was not reset, and you must manually reset it. For detailed instructions on how to do this, refer to the Owner's Manual by tapping the Help tab in your app.

If other information in the app seems inaccurate: 

1. Get in your vehicle and start it. 
2. Use the dashboard controls (usually on the steering wheel) to navigate to the vehicle information menu. 
3. There, you can check the tire pressure, oil life or fuel/battery level and/or view any warning lights shown in the driver display. 

If the app is running slowly or crashing, here are a few things you can try: 
 

• Force-close the app, manually log out and log back in, check for the correct delivery system and then ensure your correct credentials are entered. 
  
• Uninstall the app and then re-install it on your phone. 
• Restart your phone. 
• Check to see if your phone’s operating system is up to date by going to your phone’s settings. If it isn’t, install the latest update. 
• Clear your phone’s cache, which might help improve the device’s speed. You can contact your device manufacturer to learn how to do this. 
• Turn off “Power Saving Mode/Low Power Mode,” if it’s enabled on your phone, and retest. Power saving mode may disable or delay certain app permissions and functions from working properly to conserve battery. 

• Open the app and sign in. 
• Select the Account anchor icon, which looks like a circle with initials. 
• Select Manage my Products. 
• Select the vehicle you want to remove. 
• Select Remove and the reason for removing. 

Important: If the above process doesn’t work, in some cases, you may need to contact an Advisor for help removing your vehicle from the app. Call (877) 558-8352 for assistance. 

• Open the app and sign in. 
• Select the Account anchor icon, which looks like a circle with initials. 
• Select Add Product, then Add Vehicle. 
• Enter the VIN and other requested vehicle details, then select Done. 
   

Important: If the above process doesn’t work, in some cases, you may need to contact an Advisor for help adding your vehicle to the app. This would happen if, for example, your vehicle is not activated or if it’s linked to a different account. Call (877) 558-8352 for assistance.