I would like to create an extra long bed mod for the Gavril D-Series.Can someone tell me what are the steps to create this mod?
welcome to the forums. the wiki has a section on modding, i hereby redirect you there https://documentation.beamng.com/index.html
there is one already I believehttps://www.beamng.com/resources/extra-long-bed-for-d-series.14930/ if you want to make it a dually download the fender flares along with-it