Chevrolet Caprice

The 1991 model had a substantial restyle, replacing the 1977-based rectilinear design with more aerodynamic sheetmetal, although the chassis frame and many other mechanicals were carried over from the previous model. A major influence in the 1991 restyle was the success of the Ford Taurus with its ovoid body styling. While the Caprice was a larger car, General Motors hoped to join the trend towards aerodynamic styling and regain the top spot as America's favorite automobile.

The car's styling was not well received (some of the press calling it a 'beached whale' and 'an upside-down bathtub') and for 1993 there were some styling revisions, the most obvious being the removal of the skirted rear wheel wells in favor of more conventional, open wheel wells. This applied only to the sedan model; station wagons retained the skirted wheel wells until the end of production. The Caprice also received minor modifications to its C-pillars in 1995.

More information:
http://en.wikipedia.org/wiki/Chevrolet_Caprice