I have a tradesman with rear parking sensors only. I added aftermarket LED fog lights using all OEM components with no sensor positions. The strange thing is, in reverse if you get the nose of the truck close to something (turning while backing) it still detects the front potential impact. What sensors are used for this? I have been all through the truck and cannot find any other sensors that would see this? I think it is a great feature, many people don't watch their nose swing when backing so it good to have... but what is it using? just interesting to find hidden tech all over!