I have several Korean advertisement of the car mentioning the name I am searching for.
GMK (General Motors Korea) is the manufacturer of the ?_________? Caravan
Hint: The name consists of six characters
I fear, I mislead you a little bit with my previous answer. I try my best to correct that:
General Motors of America produced their produced cars in several divisions: Chevrolet, Buick, Pontiac, Oldsmobile, etc..
General Motors Korea did obviously the same. One more hint: The name I am searching for contains six characters, the first one is an 'S'