Recently my 1995 Riviera S/C has been making a very high pitched whinny noise between 1500-2100 RPM. I stopped by my local Chevy dealer and a tech. took a quick look and put a stethoscope on some parts on my engine and finally said he thinks its the power steering pump... But, at idle when i turn the wheel it doesnt seem to have any difference in performance. But u can hear the normal power steering going out noise between those RPM's I mentioned before. I am wondering if it is the power steering pump? and What does it take to change that out myself?

sounds like the issue i had/have. only heard it when i was going slower. i noticed zero change in performance or handling ability. they said my pump is GOING bad. not bad yet..but it could go at any day. said its an annoying job to do. from what i remember the alternator needs removed. i think he said its like 1-2 hours labor. dont remember it being too complicated though.

oh yea...and ive been drivin on my bad pump for like 6-8 months now.

The alternator does have to be moved out of the way to replace the pump but it is not as difficult as it might sound.
Someone that's done it before can remove, replace and bleed the system in about 1.5 hours max.

u sure its not a little dif on a 95? remember..the setup is a little dif..but couldve swoooornnn he said that..even still take 5 minutes to do it

Yeh, could be different on the 95. I'm not familiar with that setup.

A couple of month's ago I would have sworn my power steering pump was going bad. Sounded just like a bad pump, squeeling and all the usual sounds you would expect from a pump, even got louder when i turned the wheel at a stop.
I got out a stethoscope and listened to all rotating pulleys and found it was one of the accessory tensioner pulleys going bad. Replaced that one and noise went away. Then a couple of weeks later when I felt up to it I replaced all of them and the belts.
Using the logic that if one pulley was bad all the others were soon to follow and i had 98K miles on it.

Ok Thanks. Yea doesnt seem too bad. But I have been looking on parts and can you use a power steering pump from a N/A motor? Because I'm looking for parts and I found a pump but it doesnt say supercharged model? and Another pump says exc supercharger. so idk if there's any difference?

i think all series one l67s are interchangable. not sure if the series 2 will work. rick...chime in here.... lol

Look UP, I added to my post.

I don't know about the different model pumps.
Best thing to do is ask at the auto parts store, they will be able to tell how many different P/N's there are. Or a junk yard has interchange books also.

My riviera is close to 120K mile and I have replaced the brake master cylinder, The top Coil pack, and the belts. Now it makes a really weird whine noise. thinking its power steering. and at about 2100 RPM I can hear the whine but it also sounds like a gear clicking kinda noise... like a high pitched Click Click Click Click like its just spinning and missing, not gripping the teeth? idk thats the best I can describe that right now...

Well my friend was like oh power steering, but its odd that it only makes noise at a certain RPM range. What the guy said to me was that it is the power steering pump after listening. In my words I just said he thinks. so idk.

Well, It's very difficult to diagnose noises from the front of the engine because there are so many possibilities with all the pulley bearings and such being driven by the belts.
It's even more difficult to diagnose noises on the internet, sorry.

i think its the pump.
a pump shouldnt be expensive...there were a lot of series ones out there.

Also I wish I could replace my coil packs because my motor misses and doesnt fire properly under acceleration.