Yes, they can. The Super Bowl pits the NFC winner vs. the AFC winner, and the Vikings are in the NFC, while the Steelers are in the AFC. In fact, these two teams played against each other in Super Bowl IX.
The Vikings have won 8 and lost 7 in the regular season to the Steelers. The Steelers also defeated the Vikings in Super Bowl 10.
Minnesota Vikings in Super Bowl IX against the Pittsburgh Steelers.
119 by the Minnesota Vikings in Super Bowl IX against the Pittsburgh Steelers. The Vikings lost 16-6.
DL Dwight White of the Pittsburgh Steelers in Super Bowl IX against the Minnesota Vikings.
According to the box scores that I have seen, the Steelers were credited with 0 sacks in the Super Bowl IX game against the Minnesota Vikings.
Minnesota Vikings. The Vikes gained 119 net yards against the Pittsburgh Steelers in Super Bowl IX.
The Pittsburgh Steelers recorded a safety in Super Bowl IX against the Minnesota Vikings when Vikings QB Fran Tarkenton was covered in the end zone recovering a fumble by running back Dave Osborn.
The Pittsburgh Steelers played against the Washington Redskins in the 2012 Super Bowl and did not have a final match against the Arizona Cardinals. Further information can be found on the Pittsburgh Steelers Wikipedia page.
The Stellers in 2009
The Steelers have a 5-7 record, including playoffs, against the Denver Broncos in Pittsburgh.
The Rams are 15-6 against the Pittsburgh Steelers all time.
51-0 against the Browns.