Request one new GM verification code and enter only that newest code; requesting several codes invalidates the earlier ones and commonly produces a persistent mismatch.^1^
Retry with a clean authentication session
- Stop requesting codes for a few minutes.
- Close the GM sign-in page on every browser or device where it is open.
- Open the official GM Account sign-in page in a new private or incognito browser window.
- Sign in and request one verification code.
- Use only the most recently received email or SMS code. Do not use an earlier message, even if it arrived later.
- If using an authenticator app, enter the code currently displayed for the GM account, not a similarly named Microsoft or work account.
GM uses email verification by default and can also use SMS or an authenticator app after those methods have been configured.^1^
If the Authenticator code still mismatches
Time-based authenticator codes depend on an accurate phone clock:
- Set the phone’s date, time, and time zone to automatic.
- Restart the phone.
- Update the authenticator app from the phone’s app store.
- Open the app, wait for a new code cycle, and immediately enter that new code.
Microsoft also recommends correct device time, a current Authenticator version, and switching between Wi-Fi and mobile data when synchronization fails.^2^
Do not remove the GM entry from the authenticator app unless another verification method works or GM Support directs you to re-register it; removing the only working registration could leave you fully locked out.
If none of the methods works
This is a General Motors account, so a Windows or Microsoft 365 administrator cannot reset its MFA registration. Contact GM through the GM Account Support page and request that GM verify the account and reset or re-register its multi-factor authentication method.^3^
If password-reset or sign-in email access is also a problem, use GM’s plans and services troubleshooting route.^4^
Do not post the verification code, account email, phone number, or screenshots containing those details.
References