I am having the same problem as user 27423. Was this issue ever resolved?

What is your question?

My four wheel drive stopped working. I noticed that the harness going to the transfer case was rubbing on frame and corroded. I then replaced the harness and the 4x4 started working again. My issue now is I made the mistake of turning on the vehicle while the harness was unplugged and the Service ABS and Service 4WD warnings have shown up on dash and 4x4 doesn't work again. From what I have read, this may have "locked up" my TCCM. Is there something that I can do to reset this or is this a dealer fix only? Thanks. user27423 in Whitney Point, NY on September 14, 2015

What makes this problem better or worse?

NA

How long has your 2005 GMC Canyon had this problem?

two days