GM just called and belt tensioner lock up.But they want $2600. which is just nuts, which is a new head.. $85 to tow it there,$100. to tell me whats wrong, now another $85.00 to get it home.Rock Auto has a longblock for around $2000. , plus $195 core.Is there a cheaper place out there to get a long block.I could maybe swap that myself .Used to always have engine hanging from a tree in my younger days but never dealt with sideways engines.