As we all know, GM's OnStar service in analog-only cars -- those pre-2004 -- will end in a few months. Based on the comments we've seen, there are quite a few owners who are miffed that there's no upgrade or retrofit available. For you, Popular Science has posted the instructions on how to hack your analog system so that it can at least receive GPS signals on a laptop. Warning: it requires removing equipment from the OnStar system, followed by electrical wizardry that not everyone will have the chops to handle. And, as if trying to keep track of things on the little screen wasn't bad enough, it looks like you always have to have a laptop with you -- maybe on your passenger's lap. It's not exactly OnStar, but it's a start.
[Source: Popular Science]