Per the manual, you can't read current map and save it, maybe someday, the buzzing might stop if you open fuel cap and then close it.
The reprogramming will take about 20 min so make sure you have fuse #2 pulled, Headlight. and a charger connected to battery, it may not work first time, you might get an error message, "download failed" then you have to do a recovery which takes about 60 min, then reprogram again. once I finally got my new TFC map to program it did not affect Cruse Control or TPMS, I think the correct units and time were also unchanged. Thanks to Dougl and Penner for their assistance, they kept me from losing my mind.
Good luck