Loud engine rumbling noise - changes in drive/park and when a/c off better. on 2004 Chevrolet Trailblazer

It gets louder when I accelerate from stops. I've seen answers to similar questions - poss water pump or fan clutch. How easy are these to replace myself? Thanks!

Asked by for the 2004 Chevrolet Trailblazer
1 answer
this needs to be looked at to determine issues