When I had it demonstrated by someone from that area, I didn't pick up even the hint of a light 'L' in the middle. It was more like "Skookle", accent on the first syllable.Skoo-Kill. Maybe a very light L to make it school-kill - not always easy to tell.
I've heard it most often as Puh-KIP-see.While we're on the subject - how do you pronounce Poughkeepsie?