My husband and I have been searching since May for a 2015 Suburban or Yukon XL . I thought I was going crazy because every time we test drove these guys, I was having terrible ear pain, and head pressure. I even thought at one point lately it must be congestion. All of them gave the very same reaction, from the LS, SLE-LTZ, Denali. My husband said he thought it was a window not completely up, nope wasn't it. I decided to just throw it out their on the web to see if there was something going on, I stumbled onto this forum. It's confirmed, I'm not crazy, however very, very disappointed as I've been waiting for these vehicles to come out for a year now. The Tahoe's, and Yukon's have been a hit a miss, never one completely without it the noise. Now I read and viewed the report of them catching on fire. What the heck, seems like I'm going to need to wait another year, for GM to get it together or revisit the 2014. Dang, the 2015 such a better ride and nicer, not much good if it burns up or has to sit in driveway.