Is it that your dad is getting Alzheimer's?
Or has he always been kind of this way?
Maybe it is time fort him to have an evaluation, there are meds to help delay if it is Alzheimer's.

I can't believe he can't get anything for the 07 truck?
even if the motor is blown the rest is worth something .. unless the body has damage & interior damaged too?
Is it still being paid off?
with the low miles shouldn't it still be under some sort of warranty?