About half of my tenants do as well, and I think my truck is pretty nice (Nissan Titan, about 12 years old).

Best wishes Avoid situations that bring you into conflict.We could have a long discussion about violence at the end of the day, but a white guy in a boring work truck minding his own business is generally left alone.

@Casey Andersen I'd contact the incoming tenants and ask them about what time they think they'll be arriving with the truck.  

If there is a Freon leak, all repairman have a Freon sniffer in their truck to find a leak. 

I was at my daughter truck meet yesterday.

My friend called to tell me there was a moving truck at the house.

Surprise with no warning, when they arrived at their leased home with their moving truck the owner said, "Oh, sorry, the place just sold this very minute and I didn't have time to even call you.  

How on earth can you inhabit a place that has piles of trash which weigh as much as ten to twelve mid sized pickup trucks?

Where I live right now, my truck is covered with yellow pollen in my outdoor parking area.  

I gave a fully functional 1980s fridge, and one of those giant garage freezers that were popular in decades past, away to the first person that showed up with a truck, like 2 months ago.