Where is the drain plug located for a 2004 suburban 1500? I assume there is one.

 

I wouldn't bet on it. pretty sure you have to remove the lower rad hose and take a coolant shower.

 

+1 on not having a drain... the last drain plug I saw on a GM vehicle radiator was an 87 Camaro

 

I believe there are bleeder screws that need to be opened to prevent air bubbles while refilling. Anyone know the location of these?

 

All be dang... it does have a drain plug....
See attached docs...
I am not sure what the "HP2" option is so I attached both procedures...

EDIT: disregard the HP2 option that is for the truck not the burb... sorry mis-read... deleting and re-posting the correct procedures...
the drain plug is still applicable

 

Too bad they didn't show the bleeder screws (if so equipped) location.