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Old 05-12-2017, 04:52 PM   #2 (permalink)
SD70ACEJM
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I had the same issue. I bought a Delphi off of Amazon and installed it, cleared code and it came back. I exchanged the Delphi EGR valve with another and I got the same results. I even took it to my dealer and they told me I needed an AcDelco EGR valve. They wanted to do the job and it was going to cost 334 dollars. I laughed inside. I ended up buying an AcDelco EGR valve and cleared my codes, and after 2 days as of May 12 2017 I do not have a stabilitrac issue nor is my Equinox shifting weird going into 3rd gear.

Bottom line, if you didn't get an OEM AcDelco part and are having the p0404 code still, I highly recommend that you get an AcDelco EGR valve. I got mine for 90 shipped off of Amazon.

I hope that helps.

Josh
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