John McCain voted for S.900, which was also named the Gramm-Leach-Bliley Act, and...

-- Financial Services Modernization bill
-- ATM Fee Reform Act of 1999
-- Federal Home Loan Bank System Modernization Act of 1999
-- Prime Act
-- Program for Investment in Microentrepreneurs Act of 1999

The bill was passed in the Senate on May 6, 1999 (McCain voted for it on May 6, 1999). Question: On Passage of the Bill (S.900 as amended)

It passed in the House on July 20, 1999.

The differences were resolved on November 4, 1999 (that's when the vote on the Committee Report was taken, and this is the vote McCain was not present for. This was not the vote on the bill or on the merits of the bill in the Senate - that had already occurred - it was only a vote on the language of the bill.

http://www.govtrack.us/congress/bill.xpd?bill=s106-900

The Democrats (except one) did not vote for the bill itself. They only voted to accept the language of the bill. The bill would have become law even if they had not done that. All of the Democrats but one voted against the bill itself. That vote took place on May 6, 1999.

McCain voted for the bill on May 6, 1999. He voted on the merits of the bill on that day, and he voted to pass the bill on that day. The only vote he did not make was on the language of the bill - how the bill would be worded.