The Blues remained without star Paul Kariya, sidelined since early November by a hip injury. Kariya had appeared hopeful of returning after getting a stiff test in the morning skate.
"I thought he looked pretty good," coach Andy Murray said earlier in the day. "Skating, shooting, doing the things he does.
"I gave him an extra lap to test him."
The 38-year-old Sundin got the first goal in the Canucks' 3-0 victory in Game 2 Friday night in Vancouver. The Canucks had a 2-0 series lead.
Kariya is attempting to return from a pair of hip operations, one on each side in January and February. He had two goals and 13 assists in the first 11 games of the season.
Kariya had been skating on his own in Colorado, where he had both operations, while the Blues managed one goal and lost the first two games at Vancouver.
"I felt really good," Kariya said. "Legs feel good, hips feel fantastic."