99 Yukon, Power loss..Fuel Pump Gurgling

Hello All

I have a 99 Yukon (110,000). Intake manifold gasket recently replaced. A short time after I noticed the Yukon occasionally bogging (badly, sometimes popping noises) while accelerating. Fuel pump just failed. I replaced the pump and filter, the pump sounds like a brewing coffee pot. Not the hmmmm that the pump normally sounds like.

Still loss of power. The Yukon does not seem to have as much fuel pressure as it should. Shoud I investigate or replace the fuel pressure regulator?

Thanks,
Mark