1. Loosen the lug nuts on the rear wheels, but do not remove them completely.
2. Raise the rear of the van using a jack and jack stands. Never work on a vehicle lifted by a floor jack.
3. Remove the rear wheels.
4. Remove the brake drum mounting bolts.
5. Slide a bearing puller behind the brake drum and attach it to the axle hub.
6. Use the puller to remove the brake drum from the axle hub.
Be careful not to damage the brake drum or the wheel studs when removing the brake drum.