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2017.5 CTS Luxury 2.0t
29 Posts
Just got my 2017.5 CTS, 14k miles, 8L45 transmission, back from 2 wks at dealership for slipping in stop/go traffic or from slow or stop and then going up steep hill or driveway. Feels like wrong fluid in trans from the past. Software update did not fix, changed to new formula fluid. service writer gave me the "it will be in learn mode for 200 miles or so" spiel. We shall see. Ref. document #5181942 #18-NA-355. FLUID P/N 19417577
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