Didnít they just take the NBCHD Sports feed?
In the 5 previous years, for the Toronto race, Sportsnet had their own 30-minute pre-race show before switching to NBCSN's coverage. During the race, 2 or 3 times, Sportsnet would go to their own pit lane reporter (Todd Lewis) when NBCSN is in a commercial break. After the race, the end of NBCSN telecast was replaced by Sportsnet's own studio coverage.
This year, looks like Sportsnet has only use NBCSN's coverage like for all other races in the calendar. The only difference for Toronto was the Qualifying session being broadcast on Saturday night (and a replay before the race).