Somewhere along the line someone made an access hole in the trunk to get to the sending unit. This might be a good option if you don't want to drop your tank and it's really handy when you make the final adjustments.
<a href="http://s102.photobucket.com/user/brianl_03/media/sender1_zpsa259ac3e.jpg.html" target="_blank"><img src="http://i102.photobucket.com/albums/m81/brianl_03/sender1_zpsa259ac3e.jpg" border="0" alt=" photo sender1_zpsa259ac3e.jpg"/></a>
The center of the unit will pop off with a small amount of persuasion. Just pry gently on the sides. But first. make a mark on the top and another on the base so you can line it back up in the same place. As you can see in the first pic, I just used an ice pic to scribe a mark. Once the top is off...
<a href="http://s102.photobucket.com/user/brianl_03/media/sender2_zpsbcb788f7.jpg.html" target="_blank"><img src="http://i102.photobucket.com/albums/m81/brianl_03/sender2_zpsbcb788f7.jpg" border="0" alt=" photo sender2_zpsbcb788f7.jpg"/></a>
Inspect the inside. Once you get this far, post a pic and I'll walk you through the rest of it.
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