You can always refuel your truck at the Fuel Stations, but there are fuel trailers on the maps where you can also fill up the tank of your truck.
- Park your truck close to the fuel trailer, so the fuel tank of the truck is close to it. If the truck has a long bed, like the Azov 64131 with a sideboard bed and a crane installed, the tank is too far from the trailer to detect it when you back to the trailer. Approach the trailer with the side or the cab of the truck.
- In the menu select Refuel.
- Set the trailer the source, and the truck as the target.