This is the 7857th most frequent Russian word.
камаза
"Камаза" is a colloquial or misspelled form referring to "КамАЗ," a Russian truck manufacturer or its trucks.
КАМАЗ refers to the type/brand of truck in this sentence.
Вчера на дорогу выехал новый КАМАЗ.
A new KAMAZ truck drove onto the road yesterday.
КАМАЗ implies a specific truck that is visible or known.
Во дворе припаркован красный КАМАЗ.
A red KAMAZ is parked in the yard.
КАМАЗ describes the instrument or vehicle used for transport in this context.