Small peice that connects the water pump gear to the timing gear. Somehow lost mine in the past few months. Its 50$ from GM.. so if anyone has a junk motor please help me out, I can't do 50$ but lets see.
Number 39 in this picture
http://shbox.com/ci/water_pump.jpg
Number 39 in this picture
http://shbox.com/ci/water_pump.jpg