I think all that smoke in the ad is coming from the car.
Just to beat this dead horse one more time;
from Wikipedia:
The Cimarron was one of Cadillac's least successful models, its noticeable economy car roots were seen by many automotive writers and critics as doing much to tarnish Cadillac's image of prestige along with the V8-6-4 engine of the same era. According to Car and Driver, current Cadillac product director John Howell has a picture of the Cimarron on his wall captioned, "Lest we forget."
The Cimarron, introduced on May 21, 1981, was initially advertised as "Cimarron, by Cadillac" and sales personnel were instructed by GM to not refer to the car as a Cadillac and to inform customers that it was, technically, not a Cadillac. This strategy failed, and it became the Cadillac Cimarron for 1983.