Paul Byron tipped home Alex Galchenyuk’s shot to win it 1:13 into OT.
Unattended in front of Carey Price, Michael Chaput tied the game 12:49 into the third period. The goal energized the home team, and Price was very sharp to keep it 1-1.
Torrey Mitchell, who scored the only Canadiens goal in a 5-1 loss in Vancouver last season, got the visitors on the board four minutes into the first period.
It was Mitchell’s first goal since Dec. 8.
Shots were 38-28 Canadiens.