Hi- very strange. I can tell you that I own a 22 tahoe, my wife owns a 22 tahoe and my neighbor just bought a 22 yukon XL and none of these headlights are on in daytime. When I brought mine into the dealer for repair on the headlights they acknowledged right away that it was not supposed to do that and they fixed it while I waited. You do not have to take your vehicle for warranty work to the same dealer you bought it from. Maybe there is another dealer close to you that can look at it. But its my understanding the headlights should not be on during the day.