Right next to the steam pipe is some wire going into the TB. I broke the bracket that it clips into, although it goes in and stays in; it no longer clips into place. What sensor is this?

Edit: It's right above where the steam pipe goes into the tb.

 

http://shbox.com/1/throttle_body2.jpg

Could only be 1 of 2 things.....

 

TPS thats what I thought... thanks. How much would it be to replace one? It still works I just worry about the wire falling out while I'm driving.

What could happen if it falls out while driving around?

 

It's unlikely that it would fall out while driving but it is of course a remote possibility. Nothing too bad would happen as a result. But to replace, it GM sells pigtails that you can use. You can splice the connector back in, or remove the pins from the original connector and push them into the new one once you remove the wires that came with it. Shoebox has a list of part numbers for various pigtails on his site. Shouldn't cost more then $25 or so.