mike conway led the last practice session in the no. 31 whelen engineering racing entry with a time of 1 minute and 36.865 seconds. stroll's no. 37 jackie chan car was second-fastest. the no. 90 cadillac of vautier set the third-quickest lap. rast's no. 77 mazda, along with albuquerque's no. 5 mustang sampling entry completed the top five overall entrants. though the session passed relatively peacefully, the right-rear tire on the no. 32 united autosports vehicle driven by bruno senna blew on the track. in gtlm, hand once again went fastest in the class with a lap of 1 minute and 44.602 seconds. bruni was second-fastest in the no. 912 porsche, and his teammate pilet placed third in the sister no. 911 car. cairoli set the fastest time in gtd, followed by jeroen bleekemolen in the no. 33 riley mercedes-amg gt3 car.