Exhibit
31.1



I,
Susan B. Sheffield, certify that:



| | 1. | I
                                            have reviewed this report on Form 10-K and all reports on Form 10-D required to be filed
                                            in respect of the period covered by this report on Form 10-K of GM Financial Consumer Automobile
                                            Receivables Trust 2019-1 (the “Exchange Act periodic reports”);
| | -- | -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | 2. | Based
                                            on my knowledge, the Exchange Act periodic reports, taken as a whole, do not contain any
                                            untrue statement of a material fact or omit to state a material fact necessary to make the
                                            statements made, in light of the circumstances under which such statements were made, not
                                            misleading with respect to the period covered by this report;
| | -- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | 3. | Based
                                            on my knowledge, all of the distribution, servicing and other information required to be
                                            provided under Form 10-D for the period covered by this report is included in the Exchange
                                            Act periodic reports;
| | -- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | 4. | Based
                                            on my knowledge and the servicer compliance statement required in this report under Item
                                            1123 of Regulation AB, and except as disclosed in the Exchange Act periodic reports, the
                                            servicer has fulfilled its obligations under the servicing agreements in all material respects;
                                            and
| | -- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | 5. | All
                                            of the reports on assessment of compliance with servicing criteria for asset-backed securities
                                            and their related attestation reports on assessment of compliance with servicing criteria
                                            for asset-backed securities required to be included in this report in accordance with Item
                                            1122 of Regulation AB and Exchange Act Rules 13a-18 and 15d-18 have been included as an exhibit
                                            to this report, except as otherwise disclosed in this report. Any material instances of noncompliance
                                            described in such reports have been disclosed in this report on Form 10-K.
| | -- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



In
giving the certifications above, I have reasonably relied on information provided to me by the following unaffiliated parties: The Bank
of New York Mellon.



|By:    | /s/
    Susan B. Sheffield                            | 
|------ | ----------------------------------------------------- | 
|Name:  | Susan B. Sheffield                                    | 
|Title: | Executive Vice President and 
Chief Financial Officer | 
|Date:  | March 4, 2022                                         |