I'm driving a '93 Oldsmobile Cutlass that has gone bad (so, I gues I'm not really driving it... I'm riding my bike and passing by my '93 Olds!) and it was suggested by Dad to get a diagnostics code reader for about $60. I am a car Newbie! I found a coupon to get my diagnostics code read for $30, and figured I might as well buy my own reader, since it was mentioned to be the same price as two reads! My question is, How do they work? Do they work on all cars after a certain year? Can I plug in my 2000 Chevy S10 Pickup to the reader as well? Does it have sounds and flashy lights? I guess I want something that is going to last, but I really don't need all the super amazing bells and whistles, I just want to be able to tell what's wrong with my car. What do you all suggest? Know of any good online stores in the US, or even offline, that I might be able to find. I know autozone/checker marks up prices almost double sometimes, but if there are other places... Favorite brands? Advice? tips? Requests for fewer question marks? In my threads?