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This model is fantastic! For the replace, just had to modify the carvariations file to get the colors correct and vehicles.meta file to get the livery/signs randomized. Great stuff!

@outragedmetro If you add "FLAG_HAS_LIVERY" to the bus flags in vehicles.meta file, the sign and livery will change when you spawn a new bus.

Exhaust_accel*

@Clarkes inside each awc are wav files called engine_accel and exhaust_excell

@Clarkes Are you talking about the sound files? Theyre all inside the awc files

@p1mp1n https://www.gta5-mods.com/vehicles/2009-gmc-topkick-hd

@Clarkes I never figured that out. It might be some generic sound file that's shared between many of the vehicles in game.

@Kcsaints66 Sorry, I don't use fivem so I'm not sure what the issue is.

@FiVEpointOHHH nevermind I was wrong, it doesnt have a modkit at all. In carvariations.meta you need to replace <kits /> with:
<kits>
<Item>0_default_modkit</Item>
</kits>

@FiVEpointOHHH Possibly the modkit id is conflicting with one from another mod