Clint Jensen, who shared the lead midway through the tournament with Higton, carded a 2-under 70 on Friday and is tied for third place with Brad Sutterfield, who shot a 3-under 69. The duo is knotted at 12-under-par 204.
If Higton can hang on and visit the winner's circle on Saturday, he will earn his first victory on the Canadian Tour. He tied for sixth last week and if he hoists the trophy, he will become the sixth American-born player to win in six events so far in 2004.
Pettitt posted a 6-under 66 in the third round and is at 13-under-par 203.
Derek Gillespie, who won this title last year, shot a 5-under 67 and is tied for fifth place with Rafael Alarcon (65), Will Moore (67) and Chris Wall (67). That group is tied at minus-11.
Erik Compton (70), Scott Ford (66), Miguel Guzman (68), Jesse Hibler (70) and Conrad Ray (69) share ninth place at 9-under-par 207.