Hello I have a 2004 Chevy 2500HD with the 6.0 in it recently snapped the two bolts holding the thermostat housing and can’t find the replacement sizes anywhere online. Does anyone know the sizes of those 2 bolts? thank you.

 

They're unlikely to be generic bolts You'll probably want to head down to your auto parts store and get the right ones. Bring your VIN.

 

Did you get the broken off pieces of bolt out?

 

I believe they are 6mm X 1. Dont remember the length.

 

Then you need 6mm bolts