Exhibit 99.34 Certification Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 with Respect to the North Valley Bancorp Annual Report on Form 10-K for the year ended December 31, 2002 Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 (subsections (a) and (b) of section 1350, chapter 63 of title 18, United States Code), each of the undersigned officers of North Valley Bancorp, a California corporation (the "Company"), does hereby certify that: 1. The Company's Annual Report on Form 10-K for the year ended December 31, 2002 (the "Form 10-K") fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934, as amended; and 2. Information contained in the Form 10-K fairly presents, in all material respects, the financial condition and results of operations of the Company. /s/ Michael J. Cushman Dated: March 27, 2003 ----------------------------------- Michael J. Cushman President and Chief Executive Officer (Principal Executive Officer) /s/ Edward J. Czajka Dated: March 27, 2003 ----------------------------------- Edward J. Czajka Executive Vice President and Chief Financial Officer (Principal Financial Officer) 106