good thing you mentioned it, didn't look close enough last night. Turns out it does have the 5-side nut and found the special tool at the bottom of the jack caddie in the rear.If you used a regular socket instead of the 5-sided one, your van still needs the recall done. It's a good idea to drop the tire a couple times per year to check for dry rot, clean any road grit off and top off the pressure.
I did this as a matter of fact. I found a professionally repaired new Michelin X-tour ( same as on van from Costco) on eBay for $39 and free shipping. Originally it was $59 and when it arrived I saw the repair that was not in the description and I negotiated for a lower price in lieu of a negative review. The folks at Costco mounted it for me on a spare rim and validated the professional repair.spare tire for road trips