Human: How do I deactivate OnStar in my car? Assistant: 
Deactivate OnStar
1. Call 1-888-4-ONSTAR to cancel.
2. Open the trunk.
3. Remove the trunk liner and spare tire.
4. Remove the sill plate and net.
5. Remove the right side panel.
6. Remove the three cables from the OnStar module.
7. Reassemble the vehicle.