When was the last year the packers played in a Super Bowl?

The Green Bay Packers won Super Bowl XLV on February 6, 2011, defeating the Pittsburgh Steelers 31-25 for their 4th Super Bowl win in 5 appearances (Super Bowls I, II, XXXI, XXXII, and XLV).

The Green Bay Packers previous appearance was in Super Bowl XXXII (January 25th 1998) when the Packers lost their only Super Bowl to the Denver Broncos 31-24.