I happen to have my eye on a Jeep Gladiator in second part of "She Didn't Have the Vegas Notion," over on Hoover Dam, and there's that cluster of Los Angeles-based background vehicles in a scene trying to masquerade as New York in "The Homewrecker and the Window Washer" which is where I got the shot of Ann in the Chevy cab.
http://www.imcdb.org/vehicle_478506-Chevrolet-Bel-Air-15669-1968.html

UPDATE: Wow, that's more of a background vehicle than I thought it was:
http://www.imcdb.org/vehicle_492156-Jeep-Gladiator-1963.html


In the meantime, I've got a shot from New Girl episode #1.15, and it includes Winston's Ford Explorer and Nick's red Japanese coupe(which I found out isn't a hatchback at all);
http://www.imcdb.org/vehicle.php?id=491058

I keep thinking the coupe is a Toyota Starlet for some reason.
http://www.imcdb.org/vehicle_491060.html

So far I've seen his car in episodes 1.12 and 1.15, but this is strictly from 1.15.