Pretty easy to replace ,mount on fender is three pieces-barrel nut w/3 or 4 slots , black plastic outer mount , inner mast mount that protrudes through the fender, it has 18"to 24" of antennae wire attached to it. Either go to the auto store and buy an antennae mast socket or find a pair of needle nose pliers that fit the slots tight (be careful it doesn't slip), unscrew the barrel nut and the mast mount will drop in to the fender. Take out the glove box and find the antennae wire, there will be a silver splice that pulls apart located about the middle of the glovebox opening. DO THIS OR YOU WILL CUSS FOR AN HOUR- tape a piece of wire to the antannae wire you are going to pull out through the firewall so you can pull the new antannae wire into the cab , I have replaced many of them and it only took me once to figure that out! Go under the hood pop the plug out of the firewall and pull it through. Tape the fish wire to the new antennae wire, pull it into the cab, push the plug in the firewall, do the rest in reverse and your done . It only takes me 10 minutes to do