Texture not loading into the game

I created a new texture and I've done this multiple times. However this time I'm trying to replace the vehicle using the Pounder vehicle slot in Patchday 20. I named my vehicle Pounder so it should replace the old pounder in Open IV. It shows my texture but when I spawn the car in LSPDFR my texture is not there. Any ideas on what went wrong or why it won't load into game? Also can someone tell me how create my own vehicle with its own name and how to add it the game. For example if I want to add a f250 titled as constructionf250 is that possible to install or do I need to replace a vehicle in the game?