Tom--thanks for the post. I tried the steps you outlined in option 1. Does it matter that my first key used was the one good 6 button key/remote that was the van's original and the second key I used was a transponder key only (ie, didn't have the remote on it?) This second one was purchased as a blank on ebay, cut at WalMart, and programmed by the dealer (since I didn't have 2 working keys yet).
I am using this sequence, as I understand it from my manual:
1. First key in ignition--turn to "on" at least 3 but not over 15 sec. then off and remove
2. Insert second key and turn to "on" w/in 15 sec of removing the first key. Within 10 seconds a chime sounds and the dash light starts to flash. Remove key #2
3. Insert 3rd key w/in 60 sec and turn to "on"
At this point is where my experience begins to differ from what I would anticipate in the manual: It says (verbatim) "w/in 10 seconds a single chime will sound. The Theft Alarm Light will stop flashing, turn on for 3 seconds; then turn off." When I use my Valet (non-transponder) key with the ebay 6 button key touching it metal-to-metal or even with it just lying atop the steering casing (which is where I believe the vehicle electronics are located that it is trying to communicate with), the flashing light never stops and my remote is dead as a doornail when I finish (I checked the battery in the key and it tests fine)
Any other suggestions? Sounds like you got this to work just fine. Thanks for any additional help.