Converter won't UNlock
 

The truck is an 06 Trailblazer SS awd. It has a built 4l70E with a single disc PTC 3600 stall. This am I went to take the truck out and noticed it was dogging. I looked at the Dashhawk and noticed that the converter was in full lockup at idle. I drove it down the road a little and it would not unlock. I get it back home and unplug the neg bat cable and the tcm plug. After I plug those two things back in the truck is ok. Everyone that I have spoken with has said it has to be a command issue, meaning ecm/tcm, but I replugged the original tcm in and it works. Any ideas guys? Maybe a hiccup in the computer. The battery was dead for a night prior to this happening. Thanks for any ideas. Jamie

Well they are right since it showed locked its a comand issue . Odd hickup though.

I've also just heard that it could be something involving the ignition switch. To where the tcm wasn't getting full power. These trucks have had them go on more than a few occasions.