I need to fix it so that You can't see through the bus. Any help would be appreciated!

It's easy to tweak if its only a texture, cannot remember since i saw the extracted bus texture like 2012 when tombmx first was working on lime on the releasedate of bo2 so maybe its geometry but if my memory serves me right try to save the DDS texture as DXT1 instead of DXT5 in photoshop (no alpha channel) so no transparency but that will leave random solid colored holes in the hole spots so try painting over the holes or a stamp tool that makes it look like there was no holes at all (plus this will make it look seamless)

Do you have the textures set to blend on the model? if not, Idk then 

No They are on replace, although there is a blend texture that came with it but I deleted it.

Did you still not solve this? Just use iwi to dds converter change the dds to DXT1 in the option when saving then change back with dds to iwi converter its a 10 second job to get rid of transparency.

I tried Changing the texture to 1 instead of 5 but it didn't help, sorry.