Protecting yourself and your family, as well as your vehicle and your car stereo are all excellent reasons to invest in a car security system.

You're probably eager to add a security system to your vehicle. And you'll save a lot of money by installing it yourself. That's smart. But, please do not turn the first screw before you map out a complete, step-by-step plan of attack.

Installing a car security system is a complex task. There are nearly a dozen separate components and sensors to place, wires to run, and connections to make. This guide will walk you through the installation process by explaining the steps involved and helping you lay out a plan of action.

How difficult is it to install one of your car security systems? Which harnesses are available for my vehicle? Which system is best for me? What's a relay and how do I know if I need one? Plus more...

Learn about the features and specs found in car security systems.

Now you can get OnStar® in almost any car. The OnStar FMV is a replacement for your vehicle's rear-view mirror, and gives you access to OnStar services like Automatic Crash Response, Roadside Assistance, and Turn-by-Turn Navigation. You'll also get Bluetooth for hands-free calling. OnStar has well-trained, friendly Advisors just a tap of a button away if you need them, 24 hours a day.