EXHIBIT 23 CONSENT OF INDEPENDENT AUDITORS We consent to the incorporation by reference in Registration Statement No. 333-76433 of General Motors Corporation on Form S-8 of our report dated May 21, 1999 appearing in this Annual Report on Form 11-K of The GMAC Mortgage Corporation Savings Incentive Plan for the year ended December 31, 1998. /s/DELOITTE & TOUCHE LLP DELOITTE & TOUCHE LLP Detroit, Michigan June 23, 1999 - 28 -