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P/S return hose

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Old May 1, 2023 | 10:42 AM
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Default P/S return hose

I want to change my Power Steering fluid. I've already the correct AC Delco fluid (not an ATF-fluid...).
But I'm unable to know which hose on the reservoir is the return-hose. This hose is to use for the fluid change.
I searched on web and here, without getting a safe result...
Thanks in advance for a picture or diagram.
Chris
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Old May 1, 2023 | 11:12 AM
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Originally Posted by chris383
I want to change my Power Steering fluid. I've already the correct AC Delco fluid (not an ATF-fluid...).
But I'm unable to know which hose on the reservoir is the return-hose. This hose is to use for the fluid change.
I searched on web and here, without getting a safe result...
Thanks in advance for a picture or diagram.
Chris


The orange line #1 is the pressurized output from the pump. The fluid returns through the line that arcs around the front of the reservoir.
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Old May 1, 2023 | 02:00 PM
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Hi,

Thank you very much ! So, I must use this smaller line (not the #1) to change the fluid.
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Old May 1, 2023 | 02:08 PM
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BTW, if you get a Z06 return hose you get the big P/S cooler in above pic.
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Old May 1, 2023 | 10:29 PM
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Just a reminder, but on the first C6's without coolers, the hose was shorter, and GM changed the hose to a longer unit, and uses the routing show above as well.
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Old May 2, 2023 | 03:45 PM
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I think the P/S cooler is with the Z51 option (on base cars). My C6 is a direct import from USA to Switzerland without Z51 option.
The cars officially imported in Switzerland by GM have all the Z51 option.
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Old May 2, 2023 | 05:25 PM
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Does the Z51 just have a bigger power steering cooler or is it just the extra oil cooler?
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Old May 2, 2023 | 07:08 PM
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Why does the line go way up high by the reservoir top instead of directly to the bottom port?
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Old May 8, 2023 | 04:17 PM
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Can someone confirm that you must use the return hose (the small one on the illustration, not the #1) to drain the power steering?
I’ve read a lot of contradictory things on the net....
Thank you in advance.
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