Thread is indeed over a year old, but I'm still here
personalpastries, I have not tried to park at the other Terminals at Pearson as 10cm of 'free space' is too tight to take the chance. I use the value Viscount parking garage instead, and it works great (see attached image, which shows lots of overhead space) and generally good spots next to the concrete barriers. The time and effort required to take the link train is actually faster than walking the typically long distances when you park at the standard (often full) lots at the terminal, plus its cheaper. If you do try the other lots, let me know how you make out. I suspect our vehicles have the same ride height.
I have run into problems at McMaster hospital where I rubbed the overhead bar at the entrance to the underground lot, and had to back up (other behind me were not impressed) and park above ground instead. Price you pay to have a nice vehicle I suppose