If you can, try to make the truck like an actual one, by changing the color to a green, and the seal isn't country, its actually the seal of los angeles. For extra detail, the truck would have a truck number beneath the seal, on the front and back as well, with a small pinstripe work detailing the truck name. Source: I actually work for the Sanitation Department in LA.

@Jettone8 Thanks for the input and comment. But I'm afraid I won't be able to make it that close to the actual one because of the original texture for it is very plain and these were the only things I could add to it to make it resemble as close as possible. We would need a whole new Trash Truck model to do that. These were the only images I was able to find on Google, if you could provide a more accurate picture of the seal then that would be great!

@Jettone8 This guy has done a way better job:

https://www.gta5-mods.com/paintjobs/los-angeles-real-refuse-collection