The journey begins at a mountaintop garage where players purchase a legendary but dilapidated "1982 Diamondback" for $400 from a local character named Johnny Junks. The initial experience is one of scarcity and problem-solving:

: The engine and drivetrain provide auditory and visual feedback; failure to maintain fluids or ignore temperature warnings leads to catastrophic part failure.

Beyond the garage, Junkyard Truck functions as a "life simulator," where maintaining the truck is just as important as maintaining the driver. Players must manage hunger, hydration, and sleep to avoid health consequences while navigating a day-and-night cycle. To fund upgrades, players engage in a variety of odd jobs:

: For those new to auto repair, the game provides a fully illustrated Service Manual to guide diagnostic efforts. Survival and Employment in an Open World