That's great. I'm not surprised it worked. Seen many times these early OBDII modules are supposed to be programmed and yet they work fine as P&P.Bingo! Checked a Pick 'N Pull about an hours' drive from here this am, and they had two BCMs with my P/N. Pulled the one out of a base model '98 identical to mine, plugged it in, and all is good. It even runs the tach. I kind of thought it would, because the donor had a tach with red connector.Even the mileage is close to what we think the van has. All gauges work. I suspect the codes will go away. Now need to run OBD monitors and smog it. Thanks to all who helped with process of elimination. Without proper tools, this was the route I had to go.