Yep, I somehow got notice that you sent a PM. Check out my signature though. It seems that after over 2 years of membership and over 40 posts that clearly demonstrate an abiding and longer term interest in contributing to the forum on subjects related to the Av... there still appears to be some perception of risk that I might spam you and everyone else with a flood of unrelated PMs, if only given the opportunity. I don't have pm access. I've brought the issue up before, when I first learned about it, and encounterd a sand pit. So I am unable to read PMs, or PM you back.
But I did find the thread I mentioned.... http://www.chevyavalanchefanclub.com/cafcna/index.php/topic,41895.0.html
Now I'll have to follow your link to see if it points to the same thread!
On edit, just checked. Bingo, same thread. You beat me to it Air Junky.
On whatever your encoder motor sensor question was, if you find one of the three threads on Service 4WD that I posted on, in deepest detail, in the spirit of Sperry, and re post your PM on that thread, then I will eventually find it via the "Responses" tab, and will do my best to answer, to the extent my limited experience permits, any question you might have.