2002 Buick lesabre parking lights stay on

Not much in the circuit for the parking lamps; have a look at the rear fuse block, which provides circuit protection to the lamps and carries current. Must be some kind of short to power in the circuitry.

most likely cause of this is a short to power, we often see this inside the main fuse box, call for appt to diagnose for sure, 314 291 2277