2015 Interim Model Year Design Change - New Rear Flange Nut and Washer
WARNING: This page is about a different car, the 2016 Cadillac ATS. However, it is still accessible from the selected car via links, so may be relevant.
Interim 2015MY a new design rear flange nut (5) and washer (4) were implemented. Discard the removed nut and washer and do not reuse. The new nut and washer are to be replaced together for use on all model years. The new nut is to be tightened to 319 Nm.