Hi again,
Well we've had two sunny, dry days in Chicago, and my squeak is back. I really thought I finally had it beat. I should add that I have silicone sprayed or silicone greased all my weatherstripping, my tailgate lock and dovetail, my door locks and latches and my hood hinges, latch and bumpers. I am dealing with a rather subtle but very high-pitched squeak or chirp, which is gone on rainy days. I am going to go ahead with my soundproofing project anyway. It may diminish the sound or I may find a source when the interior is pulled. Thanks for the ideas.
Dave