OnStar is an in-vehicle safety and security system designed to help protect you and your family and provide peace of mind on the road. And now with the OnStar Guardian™ app, you can get key OnStar safety services in and out of any vehicle.

OnStar is available in Chevrolet, Buick, GMC and Cadillac vehicles. Some services may not be available in all vehicles.

Your vehicle purchase comes with a 1-month trial of OnStar One* or OnStar One Super Cruise (vehicle hardware-specific),* which includes all the features of Safety & Security* and Connect Plus.* Purchase a plan within your 1-month trial, and you’ll get an additional 2 months on us.

If you recently purchased a 2024 or 2025 vehicle, please log in to your account to view the latest trial information and features impacting your vehicle purchase, as many models include extended trials of some OnStar features.

OnStar-equipped pre-owned 2015 and newer vehicles can get a trial of OnStar One or OnStar One Super Cruise (vehicle hardware-specific), which includes Safety & Security and Connect Plus for up to 3 months.

Please note that all features may not be available. Check with your Cadillac Dealer for details.

If you recently purchased a 2024 or 2025 vehicle, please log in to your account to view the latest trial information and features impacting your vehicle purchase, as many models include extended trials of some OnStar features.

OnStar plans start at $9.99 a month. Plus any applicable taxes & fees. Explore our plans here.

You can manage your account and connected services online by visiting your Cadillac account, pushing your blue OnStar button in your vehicle and speaking with an Advisor, or calling 1.888.4ONSTAR (1.888.466.7827).

You can visit your Cadillac account to start the activation process, or get help from an Advisor by pushing your blue OnStar button in your vehicle or calling 1.888.4ONSTAR (1.888.466.7827). You can activate or change services anytime, and if you are enrolled in a trial plan, your paid OnStar service plan will be added to the time remaining in that plan.

If at any time you wish to cancel your OnStar service, push your blue OnStar button to speak with an Advisor or call 1.888.4ONSTAR (1.888.466.7827). If you let your service plan expire or choose to cancel it, your OnStar system will be deactivated. All services — including Automatic Crash Response and Emergency Services — will be shut off. Your vehicle won’t be able to connect with us for help, even in a crash.

You may transfer your OnStar service plan if:

• You have an active, customer-paid OnStar service plan and account.
• The primary driver does not change.
• The new vehicle is equipped with OnStar hardware.

If you still own the vehicle listed on your service plan, the plan cannot be switched to a different driver. Any service plan included with your vehicle purchase remains with the vehicle if it is sold or traded in with an active OnStar trial.

Starting at $34.99/month, OnStar One includes:

• OnStar Guardian^® app*
• Roadside Assistance*
• Safety Services*
• Stolen Vehicle Assistance*
• Audiobooks*
• Games*
• In-Vehicle Wi-Fi^® Hotspot*
• Internet Browser*
• Music*
• News*
• Podcasts*
• Video Streaming*
• OnStar Basics* for 2024 and earlier vehicles:
  • Automatic Crash Response*
  • Navigation*
  • Remote Commands*
  • Voice Assistant*            

You can visit the Plans page or your Cadillac account to learn more about OnStar services.