2000 caravan lock cylinder broken

I am trying to replace a brocken ignition lock cylinder on my caravan, but it appears the only way to remove it is to turn the key to the run position. The reason I am replacing it is because it won't turn at all....quite a dilemma...any suggestions?

I also need to know how to rekey the lock. The dealer replacement does not come keyed

you may have to drill out the center but i would first wiggle and wiggle the key with a pair of vise grips on key and the dealer should be coding your cylinder we do when we sell one ask dealer who codes the cylinders they use in the shop when their techs replace them