How do i drain my antifreeze from my '06 GMC Sierra

i believe they stopped putting drain plugs in so you have to remove the lower rad hose and cuss the idots as you get coolant all over the place. ive heard some people have a heater core return there low and install a tee that you get for flushing with a garden hose, so next time it wont be so bad

Yep, get yourself a big drain pan and disconnect the rad hose.