On the 04+ the proper way to bleed air out is this.....
first take the main fill cap off the radiator and fill to the top. Start the motor and it is low you will see the coolant level drop inside the radiator. If it drops add coolant to the top. Once the engine is just about warmed up check the coolant level again. If filled properly you will start to see coolant burp out of the fill neck where the cap goes. Once this happens put the cap back on and give her a go. I tried and tried and tried and tried the bleeder screw but to no avail. I just did my coolant elbows and that's exactly what the 04+ manual says! Once bled properly check every day like stated about to see if the coolant level is dropping