I need to remember to drive it more often.
That's something you need to remember?
Every time I see any of my vehicles, I make excuses to run errands just so I
can drive them.
Wayne, put your truck into regular rotation with your other cars and when it's the truck's turn, regardless of the "mission", drive it! Don't make excuses not to drive it like it doesn't have ac or power steering, or gas is too expensive or some other bogus reason.
Vehicles don't like sitting around doing nothing. That's when they start falling apart, as you've experienced.