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It's an easy job. Disconnect the relay connection under trim, beside hatch latch. Also the coaxial connection behind drivers side cargo shade track. Its under the carpet behind the track. Pop out the rubber grommet going through the body to antenna.
Remove the wheel and inner fender for easier access to antenna. You'll have to reach up to get to the big plastic nut where antenna meets body. Spin the nut off.
2 or 3 bolts on the antenna motor to car body and your done.
You probably only need the finial end and ribbon to repair it. I got mine from G.M.