The front fender emblems are held on with nuts that must be removed from the back of the fender. At least on my 80, you have to remove the fenders to be able to get to the nuts, as there is no access from under the hood. As for the rear quarter emblems, they are a press fit on mine, meaning just a little pressure and I was able to remove them. I swapped the rear emblems from the Cheyenne emblems to the Silverado, and it was pretty easy.