Well I got it on the engine stand, when turning over I can hear a clunk from the bottom end so this supports what the previous owner told me that it has a bad rod bearing. I canont get my compression tester tight on the plug hole so I think im just going to tear into it ill post what I find. Now I am getting scared about were to find parts for the GMC motor.

Last edited by Truck whisperer; 06/12/20 02:12 PM.