Manually install the following from Microsoft’s official website:
GM Techline Connect software is a diagnostic tool developed by General Motors to help technicians diagnose and repair GM vehicles. The software provides a comprehensive platform for troubleshooting and repairing a wide range of GM vehicles, including cars, trucks, and SUVs. gm techline connect software download
Purchase a subscription (e.g., for service programming). The Ultimate Guide to GM Techline Connect Software