Originally Posted by
jamiel
The primary thing to remember which no one has said is that you pre-clear customs/immigration at YVR, so don't have to bother with that in LAX. Therefore, you really don't have anything to worry about...you're just arriving the same as if you flew in from Denver.
Correct -- I left that out because OP called it a D-I transfer so I assumed that was already known, but it's worth pointing out just in case.
There really is a 1h30m MCT at LAX for generic D-I transfers, because somebody could be connecting from DL at terminal 2 to UA at terminal 7, and there's no realistic way to do that airside.
OP: You should arrive at either T5 or T6 (the website is unclear; I know AC uses T6 for departures but they might use T5 for arrivals) and you'll be departing from T7. They're adjacent to each other and if you just follow the signs and stay airside you'll be fine.