Salo left four shifts into Game 6 on Sunday with an undisclosed injury, saying only that he was day to day.
Defenseman Kevin Bieksa said that Vancouver is obviously a better team with Salo but "we plug in whoever we plug in and we play the same way."
Salo, 36, missed the first four and a half months of the season recovering from a torn Achilles tendon, but was Vancouver's best all-around defenseman the year before. He had one goal in the first five games of this series.
Defenseman Keith Ballard, a surprise healthy scratch the last two games, was in the lineup.
Chicago was without forward Bryan Bickell, who is out six to eight weeks after surgery Monday to repair a lacerated tendon in his right wrist. Bickell was cut by a skate blade in Game 2 and missed Game 3, but returned to score two goals and four points before he had to come out.
Blackhawks forward Tomas Kopecky, out since Game 1 with an upper-body injury, skated Tuesday but didn't play.
Information from The Associated Press contributed to this report.