Welcome to the forum!! There are several schools of thought on this one. Here's the link to the thread.
http://www.automotiveforums.com/vbul...t=sending+unit
Mine has started doing this, so I am not looking forward to this costly repair. I do have a friend who is a service manager of a local dealership, so I can get it done cheaper, but it will still be a chunk of change. Hope the above thread helps. It sure would be nice if there was an access panel!!