Especially with larger trucks, considering how quickly they depreciate and how much they cost, it's important for anyone thinking of buying or leasing a truck to look into 'Gap insurance'.
Gap insurance covers that amount between what is still owing on the vehicle and the amount the insurance company is willing to pay out in the event of a total loss or theft.
Even if you say your truck is worth $150,000, and that's what is owing, and the premiums you pay are calculated on that amount, the insurer may still only pay out $100,000 if they deem that to be the value at time of loss, if it's totalled. The owner would then be stuck with no truck, and still owe the difference of $50,000 to the finance company after the $100,000 payout is paid.
Apparently Gap insurance has a small window of opportunity when it can be purchased, so best to look into that option before you sign the paperwork when you're buying or leasing a truck (new or used). Not only can this oversight put one out of business, it could potentially bankrupt him, depending on the amounts.