I have a 2016, 2500 Chevy Express 4.8 liter V8.

I replaced the radiator and burped the system. No over heating issues at all. But I have a horrible squealing sound that comes and goes in intensity. It seems to be coming from the radiator cooling fan. I don't know much about how this fan system works. It seems to be running off the engine with a clutch of sorts. Would love any information anyone may have to help point me in the right direction.

Thanks!

 

Welp, this has been solved. It was protective cardboard on the back side of the radiator that got sucked up near the fan and was rubbing! Glad that's solved without more money.

 

Good to hear and thanks for coming back with the answer.