What size has this coolant drain plug? Passenger side close to starter.

OK. Finally I've got some information on this one. Part # is 11588949 16x1.5 mil.
It's a $10 item and online shipping is 3x times. Shipping to Canada though.
My local GM dealer said it's not available right now.
So any one here with reasonable shipping to Canada.

OK. Another update. I've got it finally from another GM dealer.
Thanks for your support.




Thanks.