Can you open a 1994 Cutlass with power door locks with a slim Jim?

That's easy. Of course you can. But the trick is not a slim jim. It is a coat hanger. I locked my keys in my car once outside of my work place. So I took a coat hanger, brought it down towards the sliding lock mechanism itself, and then poked up and down until I figured out where the mechanism was. Then simply slide it to the left, try not push too much of the hanger in otherwise you won't have the necessary leverage and the hanger will bend.