I just had some power steering hoses changed out in my 13 Silverado. They are thankfully available aftermarket at NAPA. The shop refilled the ps with atf fluid. Book calls for PS fluid. So, I (myself) exchanged the ATF out and put PS fluid in, per the GM spec. I was going to call the garage and just gently mention that whoever worked on my truck should always check alldata or whatever for the specs. However, maybe it is common practice for places to use ATF fluid. Before I call down there was curious if anyone has any history with this.
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