there are actually 2 or three temp sensors on your truck. one for the computer, one for the gauge, and one for the e-fan if equipped. oil pressure sensor or switch should also be on the pass side of the block.
any competent repair shop should be able to adjust your odometer for a few bucks and give you the paper work to show it was done legally. :thumbsup:
also, you might want to break up the individual questions into separate threads. :thumbsup: