[ponygirl]

Can someone explain the possible reasoning behind torching the truck? He had abandoned the truck way out on a forest road in the snow...wouldn’t it have been several days before someone found it if he had not set it on fire? Torching it just brought them straight to it. What would the reason be for doing that?

[MPJackal]

“Torching it just brought them straight to it. What would the reason be for doing that?”

Simple, so they search for him on the Mountian instead of where he is.

[piasa]

1. He's not playing with a full deck, so it is to be expected he will do illogical things.

Or

2. He was using it as bait to draw resources and attention to that area and away from other areas and routes.

[PghBaldy]

To bring resources and attention to the wrong place. On another topic, maybe he was wronged. I don’t care. He needs to be stopped, and hopefully killed before he hurts anyone else.

[A Navy Vet]

"Can someone explain the possible reasoning behind torching the truck?"

Something I haven't seen mentioned here is that fire is the best way to destroy most forensic evidence, other than the type of fuel to start it, which fire investigators routinely determine. Sounds like a smart move by a determined whackjob. Plus, as others have said, it may have been a diversion for his get away.