Lauzon rushed for 42 yards on 15 carries for the Vert et Or (2-3) while quarterback Jeremi Roch completed 19-of-32 passes for 251 yards and one interception. Alexandre Aube scored the other touchdown for Sherbrooke.
Gabriel Cousineau went 15-for-28 for the Carabins (3-2) and had just 151 throwing yards to go along with one reception. Sean Thomas-Erlington scored the lone touchdown for Montreal.
Aube completed an 11-play, 98-yard drive with an eight-yard run at 10:02 of the first quarter to put the Vert et Or up a touchdown.
Less than four minutes later the Carabins got on the board after a safety and then Thomas-Erlington gave Montreal its first lead on a one-yard run with 1:11 to play in the first.
The two clubs traded safeties, which put Montreal ahead 12-9 heading into the fourth quarter.
Lauzon capped off a five-play 51-yard drive with the go-ahead touchdown with 4:57 to play in the game.