Yes, you can definitely add a navigation system to any car either through DIYs or by taking help from a professional. However, if you’re not sure about the technicalities then it’s best to consult professionals. There are usually three kinds of GPS navigation system available for cars. You can either opt for a factory-installed system while buying a new car, or a dealer-installed system on a new or used car, or you also have an option of getting a portable digital device which requires little to no installation and can be easily installed. And all cars have an option to connect an aftermarket car stereo, some of which comes with an in-built navigation system, so you can try that as well.