Searching would have gotten all the info the OP needed. But meh *rolls a blunt* I have never worked on an LS because where I am living the only people I see driving them are soccer moms and guys that have their hair cut like Pauly D's. They go to the dealership for everything. If the OP didn't know he needed to bleed the system, he really had no business taking the T-stat out in the first place.
I was waiting to see how long it was going to take a mark owner(assuming by your avatar) "visiting" the LS section to get to their true agenda, to slam an LS owner for being an LS owner.
It was not a matter of if, it was simply a matter of when.