I checked my fluid level before I started and it was exactly at the cold line. Since I can't remember the last time I even checked it, it doesn't appear to be losing any fluid. I used the O'rielly brand PS fluid that said (I think) was compatible with GM and other manufacturers. I flushed the first two bottles through per your how-to, then I had a partial bottle of Valvoline with stop-leak from when I bought the car 5 years ago or so. Luckily I had bought a bottle of conditioner because I was out of fluid at this point so I topped of with the Lucas conditioner.
When you say Dex III or VI are you referring to transmission fluid?
I haven't heard the loud noises anymore but maybe just a faint whine which is somewhat normal; likely because I'm listening closer now.
I'm glad I'm not the only one who made a huge mess
