GE Refrigerator Model GSH 25S GPA SS

Question

The water is not coming out of the dispenser. I have a small pin hole in the water line where the line makes the turn to go up the door. I can disconnect the water line in the front before it goes up the door and press the paddle and I have a steady stream of water. How can I replace the water line from there. Can you remove the water and Ice dispenser out of the door? I took off the stainless steel outside cover but I can't see how it comes out and I don't know if I can replace the water line even if I get it out. Can you help me? Thanks, Russ