...On my 2016 Denali. Using previously posted directions and a you tube video, I swapped the license plate bulbs, the reverse lights and the fog lights. The truck looks so much better now but I haven't had a chance to run it at night yet to see the real difference. The fog light swap is straight forward. I put mine on ramps to give myself more room to work. For the reverse lights, complete removal of the plastic panel on the hatch is not necessary. I was able to loosen the bottom half and get my hands in there to swap the bulbs. The license plate bulbs are easier than they look... just loosen the T20 screw, but don't pull it out. Once loosened, use needle nose pliers to pull on the screw while slowly rocking the bulb assembly free. And one more tip... the you tube video I watched suggested to chock the wheels and put the car in reverse to check your work. Please don't do that. All you need to do is hit the unlock button on your key fob and the lights will come on. No need to take an unnecessary and dumb risk. If the bulbs don't work, remove them and flip them around and check them again. There are plenty of previously posted instructions but if anyone has any questions or wants pictures, feel free to ask.