I have a question about whether I should use product names like cars. My character in my new NA/YA novel loves Chevy's. He is a used car salesman and he lives and breathes Chevy, he wears Chevy hats and shirts.

He hates Fords (please, I don't want to start anything, my character feels this way.)

Should I use the actual car names or make them up? If I use the actual car names would that be blatant product placement? How do you guys feel about product placement in novels?