2007 Trailblazer SS E67 - T42 I'm getting a "x36 exceeded number of attempts" error when reading the tcm side of things. Ecm side of things reads fine and I can load the tunechanges without an issue. Owner changed the converter in the vehicle, so I need to change the tcm settings. Anyone seen this before? I tried reading it with the radio fuse out since it has an a/m radio, battery has 12v+ during read errors, hptuner device is in good working order since I can read & load ecm side along with any other vehicle. I sent a support ticket but figured someone might have some other ideas.