Have of you heard of such?

I have a 98 GTP(supercharged 3.8L) with about 80,000 miles. When starting the car, the information center comes on briefly through starting but goes off after started. And the fuel pump continues to whine loudly, and a gassy, exhausty smell occurs.

About a month ago the car started giving me problems with what I thought was just the ignition switch. When I turned the key all the way to start the car didn't do anything. The accessories came on (i.e. a/c, radio, etc.) but nothing from the starter. I had to turn the key 3 or 4 times to start the car.

So now today I have installed a new switch and the same thing happens. Info. center goes out, fuel pump whines, and the smell is still there. Although it starts everytime now as opposed to having to turn it back and forth 3 or 4 times. I have a new key cylinder ordered that I'm going to instal tomorrow. But for some reason I just don't think that's the problem.

You guys are alot more educated than any of the GMC or Chevy dealerships' service personal around here. So if anyone could come up with an idea of what is wrong I would very much appreciate it.

Thanks in advance,
--Scott Sword