On Jan 04,2022 while flat towing my truck behind my motorhome it caught fire and burned to the ground. It was too badly burned for the insurance to make a determination of the cause. However, it started in the engine compartment. I know it was not a bad tire because all tires were inflated until the fire popped them. I was able to get the truck disconnected from the RV and know that it remain in Neutral with nothing seized up like the transmission or brakes because the truck rolled on its own once it was disconnected and had to be chocked. I had followed all the proper procedures and my key was in acc position. I had towed this truck many hundred miles prior. That day I had towed it 5-6 hours prior to the fire. This incident took place in Alachua County Florida. Alachua County Fire Rescur case # ACFR22-0000462 Alachua Police Department case #22APD00014 State Farm Insurance Claim #36-29co-58s