How do I cancel ONSTAR?

Biggest piece of trash service ever. Received this “free service” when I purchased the vehicle. 4.5 years later I was told that a “phone line” is connected to my truck(separate number???)…had no idea or EVER USED IT! Deceptive business practices. Nice job GM/ONSTAR…way to BONE your customers. I will never purchase a crappy Mexico/canadian piece of trash Chevy EVER AGAIN. OnStar, you suck

Our team appreciates you reaching out to us for assistance, @jyo. We're saddened to learn that you're thinking of discontinuing your current OnStar services and would appreciate the opportunity to learn more about this situation. It would be our pleasure to assist further on this matter to ensure a satisfactory resolution. When you have a chance, please send us a private message with your OnStar account number and your 4-digit PIN to best proceed with this assistance. Just select the envelope icon at the top right of your screen to get started. When creating a new message, please be sure to enter Advisor_Jack to get connected directly to me. We'll be on the lookout for your response and hope to hear back again very soon. By sending us a message, you consent to the information you provide being monitored and recorded by GM or those acting on GM’s behalf, subject to the GM Privacy Statement: https://www.gm.com/privacy-statement

Where do I find my account number?