I also had my Iroc sitting there for about 3 years with old gas. When I finally came to start it, it wouldn't. I tried everything but couldn't get gas out of the lines. I disconnected the fuel filter (in case it or the lines were clogged) and put 12V to the ALDL connector that goes to the fuel pump. Got no fuel. So I was complaining to myself that I had to do the pump swap which is beleived to be a PITA.
Ordered a fuel pump, and with the help of a friend and a pneumatic gun the swap was straightforward. Not as hard as you come to beleive after reading some stories in this forum. It took us less than a day. And when I got the old pump out, I was sooo glad we did the swap. Just look at how the old pump came out:
The only difference between what you're saying is that I couldn't hear my pump work, but you do. I would change it anyway for peace of mind so I don't get stranded in the middle of nowhere.