Lewis set up Dwight King's go-ahead score on a deflection then got his first goal of the season on a short-handed wraparound, capitalizing on goalie Jaroslav Halak's stick-handling goof.
Jonathan Quick had 28 saves as the Kings snapped a five-game road losing streak in the opener of a five-game trip.
T.J. Oshie scored his first career goal on a penalty shot in the second period for the Blues, who snapped a five-game home winning streak. Oshie has 11 goals on the season and has five goals and four assists in his last six home games.
It's about enjoying the moment. It's pretty cool to get that many people together and that excited about hockey to the point they really want you to mess up. They've got a ton of red jerseys and you have to sit back and appreciate people love hockey that much and you are the one out there who gets to play the game. Just try and stick with that respect for the game and also the mentality that for me it's just about entering the fight and seeing how long I can stay in it.
— Canucks goaltender Ryan Miller on what he expects from the fans in Calgary for Game 6