It's insured with gap, and in the US trucks barely depreciate. Need to drive a vehicle anyways. My $65k is going to go much further in the market, my retirement account, and my business vs the sub 3% rate that'll be a few grand at most over a 6 year term.
If you pay it in full and someone else totals it, even not at your fault, you'll get what the insurance tells you, which even in this market will be less than what you paid in full. So you're exposed for the first 2-3 years doing that. Meanwhile if you put minimum down, it's the insurance and the lenders problem to settle.
There's many more reasons not to pay a vehicle in full if you have good credit and a use for your funds otherwise, rather than to pay it in full (only reason here imo would be bad credit, no other use for your funds that beats 2% yearly returns which almost a money market account beats lol, or a significant cash discount which is nonexistent in this market). My 2 cents.