All I ask is for an engine and a truck. It doesn't even have to have a functioning ladder, I just want a firetruck for the first time since San Andreas.
There was a fire truck in GTA IV, wasn't there?
That was an engine.
Engines are smaller and carry water, hose, and a pump. They are the primary fire suppression apparatus. And most people call them "fire truck" by mistake because they don't know the difference.
Trucks are the larger ones with the large aerial ladder on top, and are used for search and rescue, cut & rescue traffic collisions, and ventilation. In most cases (with some exceptions) they carry no water, and no hose.