A friend of my cousin was telling me that I should go and see if I could get a navigation system from a local junkyard and put it on my 90 DeVille. I thought he was crazy, but then the idea sounded pretty good. I have very limited knowledge on cars, but I kinda thought that it was impossible. Is it possible. I know I saw another thread where a guy got a navigation system from a Buick or something like that. But I mean, my car is old. What do you all think?