Historically I know the Chiefs are definitely a team that's had Green Bay's number. 7-2-1 all time against Green Bay in the regular season. Even since 1992 when the modern resurgence started, we're a dismal 1-4 against them with the lone win coming in 2007 in KC where Favre finally had beaten every other NFL team except his own. That was the game where Woodson had that game winning INT he took back for a TD.
You can go to 3:25 in the video to see it.
Don't need to remind anyone about 2011 when they were our lone regular season loss after being undefeated going into that game. Many felt that loss took a lot of wind out of our sales and lead to us laying a pretty big egg against the Giants in the playoffs that year, although you could easily argue the defense was just not very good and the offense and turnovers had been covering up a lot of the issues it had.
Regardless, it's easy to forget KC was a playoff team last year that got off to a fast start and fizzled towards the end of the season losing in the WC round to Indianapolis. On paper I'd argue we're the better team, but this is always one of those games that's going to be much tougher than a lot of people think.