Bryan
I have this loco and it is a great runner, very reliable. In case you want to order from, Lionel, or try to download a copy, the part number is 73-4505-250. As you know, this is one of the early Legacy engines. Here are the re-set instructions from page 22 of the manual.
Put the engine in PGM mode and enter the loco ID# and press SET; Again enter the ID# and press SET; Press Aux1 and enter 2; Turn off track power and wait ten seconds. Slide the Command reverse unit switch to RUN.
Good luck!