Fuel pressure is low I need to replace the fuel pump?

I need to replace the fuel pump can you help me please?

I have a 97 Tahoe with 152,000 miles on it. I purchased it 6 months ago with virtually no problems. Recently, I started having a problem starting it. It would give me a problem once & then fired up fine right after. That has been going on for a couple of weeks. Well, now, it won't start at all. I try to start it & it will just turn over & not start. We had pulled off the air filter the first time it did this & sprayed starting fluid in there & after some coaxing, it fired up. Ran fine for a couple of days & now back to square one. Starting fluid won't work now. Amongst this, I have noticed that the typical "hum" of my fuel pump isn't there when I turn the ignition to on. Instead it just clicks. I believe it is my fuel pump gone bad. But I want to make sure that if there's anything else causing this, that it be taken care of first before the more costly end of it. Thanks so much. I have ruled out the possibility of fuses & fuel pump relay.