Klaus Graf and Pickett Racing took their second straight American Le Mans Series pole with another dominant performance at Mosport Park, while SRT Viper topped GT.
Graf set the fastest overall time with a lap of 1m05.871s.
Second quickest was Level 5's lead LMP2 HPD, as ALMS debutant Mike Conway showed his class while standing in for Ryan Briscoe.
Marino Franchitti was third in the sister car while Dyson Racing was back in fourth as Tony Burgess - who joins Chris McMurry in a reshuffled driver line-up for the next three events - could only muster a time of 1m09.564s.
Johannes van Overbeek set the third fastest lap in the LMP2 class, ahead of the DeltaWing experimental prototype.
Colin Braun got down to business early in the LMPC segment of qualifying and reeled off a succession of quick laps, culminating in a session fastest time of 1m10.441s.
The CORE driver was demoted to second in class, however, after Mike Gausch crashed heavily at Turn 3 shortly before the 10-minute mark and brought out the red flags.
Gausch had been sitting at the bottom of the timesheets when the incident occurred, but due to the session not meeting the required running time, he now starts the race at the front of the class with the order being set by current championship positions.
Bruno Junqueira's on-the-road third place for RSR still remains.
SRT VIPER TAKES FIRST GT POLE
SRT Viper took class honours and in doing so claimed the marque's first pole in over a decade as Jonathan Bomarito also set the quickest ever GT lap time at Mosport.
His 1m15.462s was set moments before Jan Magnussen crashed heavily into the Turn 3 tyre wall to bring out the red flag.
The Corvette driver managed to extract himself from the vehicle under his own steam and he finished the session in second, with the other SRT viper of Marc Goossens in third.
Jeroen Bleekemolen clinched GTC pole for Alex Job Racing after trading quickest lap times with NGT Motorsport's Sean Edwards through the majority of the session.
The Dutchman emerged victorious with a time of 1m21.310s, with Edwards 0.2s adrift and Spencer Pumpelly rounding off the top three.
Pos Cl Drivers Team/Car Time Gap 1. P1 Graf/Luhr Pickett HPD 1m05.871s 2. P1 Burgess/McMurry Dyson Lola-Mazda 1m09.564s +3.693s 3. P1 Meyrick/Legge DeltaWing 1m10.531s +4.660s 4. P2 Tucker/Conway Level 5 HPD 1m08.785s 5. P2 Tucker/Franchitti Level 5 HPD 1m09.031s +0.246s 6. P2 Brown/van Overbeek Extreme Speed HPD 1m09.740s +0.955s 7. P2 Sharp/Cosmo Extreme Speed HPD 1m10.850s +2.065s 8. PC Guasch/Cheng/Cameron PR1 Mathiasen FLM 9. PC Bennett/Braun CORE FLM 10. PC Junqueira/Ende RSR FLM 11. PC Nunez/Shears Performance Tech FLM 12. PC Marcelli/Cumming BAR1 FLM 13. PC Drissi/Mitchell BAR1 FLM 14. PC Schultis/van der Zande DragonSpeed FLM 15. GT Bomarito/Wittmer SRT Viper 1m15.462s 16. GT Magnussen/Garcia Corvette 1m15.601s +0.139s 17. GT Farnbacher/Goossens SRT Viper 1m15.635s +0.173s 18. GT Müller/Hand RLL BMW 1m15.672s +0.210s 19. GT Auberlen/Martin RLL BMW 1m15.726s +0.264s 20. GT Gavin/Milner Corvette 1m16.083s +0.621s 21. GT Long/Kimber-Smith CORE Porsche 1m16.407s +0.945s 22. GT Miller/Holzer Miller Porsche 1m16.730s +1.268s 23. GT Henzler/Sellers Falken Porsche 1m16.976s +1.514s 24. GT Keen/Bell West/AJR Ferrari 1m17.039s +1.577s 25. GTC MacNeil/Bleekemolen Alex Job Porsche 1m21.310s 26. GTC Cisneros/Edwards NGT Porsche 1m21.540s +0.230s 27. GTC Canache/Pumpelly Flying Lizard Porsche 1m21.924s +0.614s 28. GTC Dempsey/Lally Dempsey Del Piero Porsche 1m21.930s +0.620s 29. GTC Neiman/von Moltke Flying Lizard Porsche 1m22.022s +0.712s 30. GTC Keating/Faulkner TRG Porsche 1m22.182s +0.872s 31. GTC Popow/Dalziel TRG Porsche 1m22.581s +1.271s 32. GTC Hedlund/Heylen JDX Porsche 1m22.885s +1.575s Grid ordered in class groups LMPC set on championship points due to red flags