I have a 97 Lumina and I am able to start it only after it "rests" for a day or so! Otherwise, I cannot hear the fuel pump "buzz" for a couple seconds when I turn the key, and it will not start, of course. After a day or so, it WILL buzz, and then I can start the car and it seems to run fine. I took it to a garage, and they said it needs a new pump for $800! Does this sound right? If so, I see I can get a pump "sender unit" for $250/350 on the web. Is this a doable thing for a fairly handy guy? I have worked on cars a bit. Thanks.