As of Sunday, July 26, General Motors has implemented its new Microsoft Entra ID login system.

The login screen will automatically change to the Microsoft sign-in experience for all users.

When logging in for the first time, you will be required to reset your password before accessing ACDelco TDS. Please follow the steps outlined in the attached document to complete your password reset.

According to NASTF, the new login process was tested at 11:30 a.m. ET on July 27, and ACDelco TDS was accessible without any issues.

If you experience problems opening ACDelco TDS, clear your browser cache and try again.

There is also an update available for TLC. Be sure to download and install the update to avoid delays.

If you continue to experience issues after clearing your cache and resetting your password, please contact the General Motors Support Team for assistance.