My 95 had a cold air draft on the passenger side that I never quite figured out, but I think it was from a defective windshield seal. It got so bad by the end that it was quite uncomfortable in winter. Hot air was coming out, but it was not enough to counter the draft. There was no obvious place it was coming in, but at highway speed it was freezing. The 99 had it to a lesser degree, getting worse with age.