Seabrook and Toews each had one assist apiece for the Blackhawks, who never trailed while improving to 12-0-3 to start the season.
Chicago's 27 points are four better than second-place Anaheim in the Western Conference standings and five better than Eastern Conference leader Pittsburgh.
Ray Emery turned aside 25-of-27 shots for the Blackhawks.
Jonathan Quick made 34 saves for Los Angeles, which saw its two-game winning streak snapped.
'SNL': 'Anchorman 2' cast, One Direction sing 'Afternoon Delight' [VIDEO]
Exploding whale video goes viral on Internet