I emailed Diode Dynamics and unfortunately this does trigger the truck into thinking there is a trailer attached. Here is their response:
Thanks for reaching out. Yes, when installing the hitch mount kit, your vehicle will think that a trailer is attached. With some vehicles, this could disable things such as reverse backup or BLIS systems. I am sorry that I did not have better news to report, however if you have any other questions or concerns, please let me know!