Any idea?.. fuel delivery problems

Hi: I hope you can helpo me with my problem. I have a 99 Suburban 5.7L Gasoline. Today I was driving on the freeway, everythig was ok, but I got some bottleneck between 2 freeways then the speed was falling down to 15 MPH, then I noticed about a loosing power (the tachometer just drop from 2 to 1) then when I push the gas nothing happend. Fortunatelly the engine was not stop and very slowly but I moved to the freeway shoulder. I check the baterry cables because I had a problem wuth the cables 4 months ago, then I check for anything loose then I restarted the engine and then works ok. I got back into the freeway and tryed to run as faster as possible, the car responds ok, like always. I continued driving but the problem happened again 2 times. Finally I got off the freeway and I took the streets because I cannot accelerate more than on number 2.5 on the tachometer because doing that the engine drops the power completely.
When I got home I just let on the street, I was very stressed. After few minutes I when to park the Sub into my garage and I push the gas couple times and everything looks normal. I'm affraid to use again before to fix because I don't know what's wrong. I'm noticed about a change on the noise of the fuel pump, I'm thinking about if something is wrong with the pump, I hopefully not because is too expensive, I'm thinking to replace the fuel filter but I want to get an advise before to proceed.
Please, anybody has an idea about what will be the problem? unfortunatelly I cannot spend too much money and I'm going to fix for myself but I want to have a clue. Another thing, when the problem happend, when I pushed the gas pedal there was a noise on the engine, like an explosion on the gas admision, mayber because was not too much gasoline delivered to the admission.
Is a filter clogged?

Update!
If somebody have the same problem. I replaced the Fuel Filter located lined up with the driver seat, under the chasis, I paid just $8.49 for the part and I did the job. Now the car is running ok, I hope this solve my problem and maybe somebody else problem in this forum.

Sounds to me like one of your injectors isn't firing correcly. Does it do it more often or worse after it warms up? Could also be the Catalytic converter plugging up.

You should read my thread on "Suburban Fuel Pump" last edited on 10-21-04 and it will explain alot of the fuel issues!