the odometer does not work and the lights for the gear seleter do not work either

My mom car is the LS model. the odometer and gear selector lights do not work. The man that inspects her car said he will not pass it with these not working. can I go to a salvage yard and take a bezel out of the same year and model car and put it in her car and will it work? Her radio kept running the battery to dead so I went to a salvage yard and got her another one. When I put it in it would not work. She had to take it to a Chevrolet dealer and have it programmed that cost her $109.00. that radio only lasted about a month when it too would drain the battery. We had to take the radio fuse out so the battery would not die after setting a couple days. She does not drive it every day mainly to church on Sundays. Do you have any ideas why the radio keeps draining the battery after setting a couple days? If I do find a bezel will everything work after putting it in or will that need programmed too?
Thank you