DJ Campbell returned to haunt Steve Bruce as Blackpool became just the second team to win a Barclays Premier League game at the Stadium of Light in 2010 with a 2-0 success.
Bruce had given Campbell his first chance in the Premier League during his time as Birmingham boss, but saw his former charge produce a 52nd-minute volley and a late second goal which handed the Seasiders their fifth league win on the road this season.
However, the Black Cats had only themselves to blame as they squandered a series of chances in front of a bumper holiday crowd of 42,892 on the way to a fifth defeat of the campaign and their first on home soil.
Only Manchester United had previously won a league game on Wearside this calendar year, and although the visitors had keeper Richard Kingson and the crossbar to thank for their clean sheet, they scrapped their way to the whistle to claim all three points.
Asamoah Gyan and Jordan Henderson went close for the Black Cats, while Darren Bent hit the woodwork with a late free-kick.