1995 Chevy Silverado Brakes and steering

I have a flat bed with spray equipment on this. I started last spring out with all kinds of power. Around august of last year I noticed the power dropping off drastically. Top speed was about 60 mph with an empty load, down hill, uphill it didn't matter. Not to long later everytime I turned the steering I could hear a moaning sound. Like low on power steering fluid. Checked the level and it was good. Started heading back to town and I was losing power like crazy. It felt like I was running with the e brake on, but wasn't. I replaced the power steering pump. Thought maybe it was locking up that was why I was losing power. I got that put in and still having the same problem with the moaning pump and also having brake issues. I have a stiff peddle when engine is off and the peddle goes to the floor and can't turn steering wheel when engine is running. I scanned the abs system. It came up with a rf speed sensor bad. Replaced that. Got rid of the code. Bled brakes. Still nothing. Replaced BCM. Rebleed. Still the same issues. Stiff peddle, engine off: No peddle when engine running.

Any idea's?