96 yukon need help fuel pressure regulator

Hi i think i need to replace fpr, i am new to this and not sure where it is. Can anyone post a picture. I was gonna take it in, but am trying to learn how to do this stuff on my own, on disability and my wife was recently laid off, so funds are limited. i have the codes,(po175, po305,p1860) and i did some research now just trying to figure out where it is. Feel kind of dumb, any help is greatly appreciated. thanks

Give us your symptoms, why do you believe the regulator is bad? (it's under the plenum). Fuel pressure test results would be nice. Just trying to help avoid replacing good parts.

ticking noise at start up, smells of fuel around engine, and i was just assumeing it was the regulator after reading different posts concerning the po175 code, i also removed the spark plug from cylinder 5 it seemed a to smell of fuel unlike the plug next to it, so i thought maybe the regulator maybe leaking causing fuel to leak in that cylinder? it seemed kind of wet too, i was gonna go to autozone and get a pressure test.