Hi Guys,

I'm scratching my head with the VIN change process for a 2007 E67 Trailblazer SS ECM.

I'm unable to choose the VIN change option in V7 software.

In the V8 software, I'm able to read the controller and then get to the VIN change screen. I can change the VIN shown in the text box, but then I see no option to program the VIN into the controller. I've tried saving the file, and performing an update and full flash. Nothing changes the VIN.

What am I overlooking? Same issue with the T42 TCM.