[TJBaker]

Maybe this??? (Maybe not, looks like you might be pointing at the longer rubber piece next to this?)

2006 Chevrolet TRAILBLAZER Base Cover - Transmission Cover Hole. CVRACDelco - 24205900 | Wholesale GMC Parts Online, Louisville KY

Cover - Transmission Cover Hole. CVRACDelco, TANGSLARGE, COVERTCV. 2006 Chevrolet TRAILBLAZER Base. Genuine Chevrolet Part - 24205900 (24205900, 24203291). Ships from Wholesale GMC Parts Online, Louisville KY

www.wholesalegmpartsonline.com

 

[TJBaker]

GM 24229746 Plug, genuine OEM part

Torque converter housing access hole GM genuine OEM part.

oemcats.com

They have it in stock for cheap.

I tried to follow up on this link. All 3 stores listed to have the part did NOT have the part or the store was not even accessible.