05 grand prix rear caliper replacement issue/questions
 

Just replaced both rear brake calipers I'm not exactly sure if the bleader should be on the bottom or the top if it's supposed to be on the bottom I'm having serious problems bleeding the driver's side. The passenger side blows fluid through smoothly I cannot I cannot get the driver's side to do it

The bleeder on any caliper is always at the top. You are bleeding out the air, and the air rises to the top of the brake fluid.

Don't some of the calipers with 2 dual pistons have 2 bleeder screws?
I was looking at my FSM for the 2006 Grand Prix, and they mentioned two bleeder screws on each caliper.

I don't recall double bleeders on dual piston calipers....all bleeders are on top to remove air easily....

That is what I thought, maybe I read it wrong, the pic looked to show two bleeder screws, but mentioned using the top one.
Logically the top one makes sense, and I cannot see why they would ever need two of them, unless the piston chambers were separate, which again makes no sense.
I'll see what my book said the next time I look at it.