This is the 7770th most frequent Turkish word.
kamyonetin
"Kamyonetin" means "the small truck" or "pickup truck" in English.
The word 'kamyonetin' in this sentence is used in the possessive form (of the pickup truck), indicating the location or part of the truck.
Kamyonetin arkasına ağır kutular yükledik.
We loaded heavy boxes onto the back of the pickup truck.
Here, 'kamyonetin' is again possessive, specifying the door belonging to the pickup truck.
Arkadaşım kamyonetin kapısını tamir etti.
My friend repaired the door of the pickup truck.
In this third instance, 'kamyonetin' denotes the motor of the pickup truck, emphasizing the source of the noise.