Castlegar is one win away from its first Kootenay International Junior Hockey League title since 1996.
Jordan Gluck made 24 saves and Jamie Vlanich had two assists to power the Rebels to a 2-0 victory over the North Okanagan Knights Friday in Armstrong.
The Rebels now lead the best-of-seven KIJHL Championship series 3-0.
Castlegar can complete the sweep Saturday in Armstrong when the two Conference champions meet in Game four.
The Rebels scored the only goal the team would need with 15 seconds remaining in the opening period.