I am hoping someone can help me. I currently have a 2005 grand prix gxp with the LS4 E40 and T4653-hd with the t42 controller. I am trying to read off the exisiting calibration from the T42 controller with no success. I am able to read and save the E40 controller with no problem. I am using the 7.5 software (check for update today) with the V2 scan tool. When I read the controller all test successfully pass. The scan tool appears to read the entire controller. Then at the very end I get an error stating the OS is unsupported. It won't even let me save any data it pulled. Can someone please tell me what I am doing wrong?
Thanks
Chris