But the user included "2021" in the title, so maybe the code was relevant around that time. Perhaps there was a game in 2021 called "Pickup 135" where players used a specific code. However, a quick search in my knowledge base doesn't recall such a game, so it's possible it's a mod or a less-known game.
Another angle: The user might be referring to a mobile game or a browser game where "Pickup 135" is a specific truck model, and achieving "unlimited money" is a cheat code or mod. For example, in some truck simulator games, players can modify the game files to have unlimited money or infinite resources. pickup 135 unlimited money 2021
Given the lack of clear information, perhaps the best approach is to outline the general steps for using a cheat code for unlimited money in a pickup truck-themed game, noting that the specific method can vary. Alternatively, if it's a mod, provide instructions on installing a mod for a specific game like "GTA V" or "Euro Truck Simulator." But the user included "2021" in the title,