Welcome to the Forum from NH.
Lots of knowledgeable folks here who freely share their knowledge, experiences, and perspectives. Knowledge is power.
I hope that you will become a participating member in the Forum's discussions.
Pics of the truck, please.
WOW!! That's a new one to me. But, similarly, I recently rode in the back of a new Jeep Rubicon, and once the seatbelt was attached and the vehicle started to move, I could loosen it at all. Quite uncomfortable.