Not sure if this counts since it wasn't a Movie, but was watching a show on The History Channel, and they showed footage of the North Hollywood Bank Robbery Shootout and one of the gunmen hid behind a Jeep Gladiator in the middle of the street.
Trailer for a movie called Colombiana
http://www.youtube.com/watch?v=rtpx5sdPLu0
Beavis and Butthead's ex-military Gym Coach\ Teacher, "Mr Buzzcut" has a Wagoneer.