Exhibit 99.4

Consent of Independent Registered Public Accounting Firm

We hereby consent to the incorporation by reference in this Annual Report on Form 40-F for the year ended December 31, 2020 of Lithium Americas Corp. of our report dated March 1, 2021, relating to the consolidated financial statements, which appears in the Exhibit incorporated by reference in this Annual Report.

We also consent to the incorporation by reference in the Registration Statements on Form S-8 (No. 333-238142 and No. 333-227816) of Lithium Americas Corp.of our report dated March 1, 2021referred to above. We also consent to reference to us under the heading “Interests of Experts,” which appears in the Annual Information Form included in the Exhibit incorporated by reference in this Annual Report on Form 40-F, which is incorporated by reference in such Registration Statements.

/s/PricewaterhouseCoopers LLP

Chartered Professional Accountants

Vancouver, Canada

March 1, 2021