This is a how to change it- a little at a time.
The other option is to disconnect the PS lines and force flush.
Ive done this on my other cars. most notably my 2003 Trailblazer. I did it on that one every 15,000 to 20,000 miles... and 157,000 later-- PS is still going strong. I prefer doing it this way. no leaks to worry about with the hoses. I know there was other Trailblazer members who disconnected hoses and ran engine to force out the fluid - then refilled- you get it all out- but it comes out with force and like I said- reconnecting hoses.
This method has worked for me- and its what Ill do.
So- im going to do the same thing with the Traverse.
Since my PS lines ARE NOT leaking-- I dont like to loosen and flush and then reconnect--- only to find out that the perfect seal that was-- is no more... and they MAY possibly leak.
So what I do is remove all the PS fluid from the reservoir- and refill with new fluid. This should allow the fluid to sort of make its way around the system and mix. In a few days ill suck out more fluid and refill with fresh fluid. I will repeat this a 2nd time---- a 3rd time- depending on how dark I see the fluid.
I did this today and it took me about 30 minutes- with taking pics and stuff.
1st. you want to get a bottle of Power Steering fluid. The one I bought is shown. I also bought a small turkey baster ($1.98)- both of these items at Wal Mart. You may also need to buy a small hose- like the one show (auto parts has hoses). I happened to have some. The manual doesnt say anything about GM Only fluid. THe Prestone bottle says its for use in GM cars.
I placed plastic under the car and in front of the car where I would be stepping.
THe PS reservoir on the lambdas for some odd reason has a small hole that makes using the turkey baster by itself- impossible (like on the Trailblazers- they had big openings- and you could use a large turkey baster.)
So thats why you have to use the small tube... attach it to the baster like so.
Then youll want to remove the OIL FILL cap. once taken off- you can pull up on the engine cover. Its held in place by 4 pop on/off studs. Simply lift.
As shown- the cover comes off- and now you can access the PS reservoir
Insert the small tube into the hole... and begin to suck out all the fluid. Youll have to do this multiple times.
I placed a white paper towel so that you could see the fluid. Its very dark. Like a dark cherry red once its on your napkin.
I dont know if its this color from the factory. (but the new fluid is CLEAR).
I used a water bottle to temporarily store the used liquid. I placed it next to the PS pump so that I wouldnt be moving all over the place with a baster full of oil. Continue to suck out most of the fluid.
Once done- I proceeded to clean around the PS reservoir with Simple green. Clean any other part that may have gotten dirty.
Once clean- I refilled. Check level and put cover back on
Before starting- the level was at the MIN. I left it at the MAX line.
Heres the old fluid... with less than 22,000.
My PS pump is not that loud. Its louder than my Trailblazer. But not loud to make me want to take it to the dealer.
Ill drive it around and see if it quiets it down... but thats not why changed a bit of the fluid.
FYI- I Only used about 1/3 of the Prestone bottle