yes I have had simular issues my Yukon Denali had the flush done in Oct 2019 with a valve body change and the problem are back. One problem i have when vehicle sits for several days in my driveway at first start up when you place vehicle in reverse I dont feel it engaging it kinda slides into gear and then is followed up by poor shifting for the next couple of miles. returned it to dealer they say cant reproduce it and cant fix it. I am also starting to hear pump whine as i am driving. has anyone had simular issues
