This just happened to me and I found lots of entries on the old board so I figured it's common enough to copy to this board. There's a handle on the inside of the stuck door. It has two plastic access covers, one on each end. Using a small screw driver pop them off. Be careful as they are easy to break. The tabs are on the top and bottom so if you slide your small screwdriver in from the side you can push up on the top and then pull them off. Under the covers are 10mm bolts, remove them and the handle and a plastic plate will come off. Under there you will find a 3-4 inch slot that's maybe 1/2" high. There's a silver rod that comes across that slot from the left (drivers) side of the van. At the end it turns 90 degrees towards the rear of the van. Near that turn you will see a metal thing with a plastic sleeve in it that has a hole in it just big enough for the metal rod. Slip the rod into the plastic sleeve and you will be able to open your door. Now it just might stay there if you make a point of not slamming the back door but if you have kids, like me, odds are it's going to pop out again. This is as far as I've gotten but people on the old board suggested going to napa and buying item # 735-2786 (Door Lock Rod Clip) $2.69 USD to correct the problem. My van is a 97 but this setup seems to be the same through at least 02.