2018 GMC Acadia - barely fits, but fits. The end of the fan housing makes contact with the cover for the headlamp, but on obstructively so. At first, I was uncomfortable with the snug nature of the fit, but then realized the benefit of having the extra length of the rear of this unit having some support. The fan openings are not obstructed. Do *not* forget - these LEDs need to be installed so that the LED chips are oriented toward the sides. The plastic base on the light has a removable screw and allows for this rotation in three different orientations. Combine this with a proper calibration with the passenger side light slightly higher than the driver side and you’ll not be thinking the Acadia’s lights are underpowered again. I’ll update the review if life turns out to be less than acceptable (LEDs are supposed to last significantly longer than their halogen counterparts), since that along with fitment is the only downside for the 2017/2018 Acadia.