22nd Mar 2013, 00:09
The 4dr LeMans, Century, Regal, Malibu, Cutlass and Bonneville-G from late 70's-early 80's all had fixed rear windows, because the large rear wheel opening didn't allow enough clearance for the window to roll down, not even a quarter of the way.
Instead, behind the fixed glass there were vent windows that opened, either manually or power assisted.
21st Mar 2013, 22:13
Not a cop car; none of the post-1977 downsized GM intermediate sedans had roll-down rear windows, only flip-open vent windows. Another cost-cutting measure that proved highly unpopular.