EXHIBIT 99.1

                  CERTIFICATION PURSUANT TO SECTION 906
                    OF THE SARBANES-OXLEY ACT OF 2002

I, Fredric L. Holliger, Chief Executive Officer of Giant Industries, Inc.
("Giant"), do hereby certify that: (a) the Quarterly Report on Form 10-Q
of Giant for the quarterly period ended September 30, 2002 (the "Form 10-Q")
to which this certification is being furnished as an exhibit fully complies
with the requirements of Section 13(a) or 15(d) of the Securities Exchange
Act of 1934, and (b) the information contained in the Form 10-Q fairly
presents, in all material respects, the financial condition and results of
operations of Giant.

Giant Industries, Inc.


By: /S/ FREDRIC L. HOLLIGER
- -----------------------------------
Name:   Fredric L. Holliger
Title:  Chief Executive Officer

Date:   November 13, 2002.