If it sounds like it is working, it probably just needs new Antenna Mast Repair Kit. It is very easy to install. Have a great one. Gene
over time the spline dries out and cracks into pieces. the repair (as drgene said) is very straight forward and pretty simple to accomplish. do you actually hear the motor trying to raise or lower? if so, you are in good shape with the mast repair kit.
Yes Sir; first, set car up on stands, Unhook battery. You have to remove the driver's side Exhaust piping & muffler, sometimes you have to have a new stainless steel band, or two, to reinstall this piping. It does help to remove the wheel. The wire loom plug is behind the rear driver's side rear speaker. Gently pushing out the rubber wire plug, to the outside.. Now look at the bolts holding it to the body, will help if you spray Wd or another brand on all bolts, first, this will ad in removing them. Buy A Corvette shop Manual from or made by Helms. This will give you all the info. you will need to do this job. Be Safe, Have a great day. Gene