Flashing an automobile control module carries inherent risks. A failure midway through a software flash can permanently corrupt or "brick" an electronic module. Always strictly adhere to these safety practices:
TIS2Web is the online successor to offline TIS. Originally, GM required an annual subscription to access SPS (Service Programming System) via a web browser. However, for diagnostic purposes, you often use a modified or locally cached version of TIS2Web to run in offline emulation mode. TIS2Web handles the database of vehicle VINs and available calibrations. Flashing an automobile control module carries inherent risks