105 Exhibit 23 CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM We hereby consent to the incorporation by reference in the Registration Statements on Form S-3 (No. 333-100345 and No. 333- 110318) of American General Finance Corporation of our report dated March 1, 2005 relating to the consolidated financial statements and financial statement schedule, which appears in this Form 10-K. /s/ PricewaterhouseCoopers LLP Chicago, Illinois March 7, 2005