All the pickup models are in the same file; "pickup.DAE" You have to open that file in blender and find the individual sections that make up the stock 4x4 single cab. The file "pickup.DAE" is in BeamNG.drive-0.21.2.0.XXXXX/content/vehicles/pickup. "pickup" is a .ZIP, so you'll need a zip opener, WinRAR etc. Once inside the "pickup.ZIP," you'll see a folder called "vehicles." Inside that is a folder called "pickup." Inside that is all the files that make up all the pickup configs and sub-parts, and the "pickup.DAE" file is in there with them. This is a screenshot of "pickup.DAE" open in blender. I've highlighted the single cab in the sections menu to the right. I hope this helps.
