Thanks for the comments, everyone!
It appears that shifting around the seat a bit has significantly decreased the squeaking. As for the actual invoice and repair details, here they are:
The cause of the issue was the sender unit. They installed new front and rear fuel senders as per bulletin LTB00304.
They also did a multi-point inspection and everything was fine. The tires were at front = 36 PSI and rear = 42 PSI.
I currently have 4,546 miles on my LR4 and the brakes were at 10 mm and the rotors are good. The tire tread depth was all 7/32" or greater with no wear.
Everything was "green" which means "Checked and Okay at this Time". But, this is what I would expect at almost 5,000 miles.
Land Rover of Redwood City does not give Land Rover loaner cars unless it's for maintenance, so they have Enterprise bring you a small SUV for the day. That's fine with me, the Kia was actually kind of fun to drive.
My only complaint about the experience is that one of the technicians got grease or something on my console and scuffed up my driver's door a little. Or, maybe I am just too picky?
Thanks for all the advice guys!
-David