under the back seat....
Is there a fuse box under the hood
The fuse for the power windows on a 1999 Buick Park Avenue is located in the fuse box underneath the dashboard on the driver's side. To access it, you may need to remove a cover panel. The specific fuse for the power windows is typically labeled in the fuse diagram found on the cover or in the owner's manual. Check the fuse for any signs of damage if your power windows are not functioning.
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Under the back seat
One blown bulb or fuse could cause this problem.
The fuse box for a 1998 Buick Park Avenue is located just below the dash near the driver's side floor board. It houses most of the essential fuses required to operate the vehicle.
if you have that manual go to the fuse box section, see what fuse it is and pull it out.
on my car its under back seat and under the hood
Pull the fuse or fuel pump relay.
FUSE!
check the charging fuse and the fuse able link on field wire
Try left lower firewall by steering column