Car safety system brand

• GM's roadside help service
• Emergency-assistance system
• Car security system brand
• System in some modern-day cars
• GM security service
• Safety device for GM vehicles
• GM car buyer's option
• Big name in car monitors
• Big name in in-vehicle security

Wikipedia Word definitions in Wikipedia
OnStar Corporation is a subsidiary of General Motors that provides subscription-based communications , in-vehicle security, hands-free calling, turn-by-turn navigation , and remote diagnostics systems throughout the United States , Canada , China , Mexico ...