Perplexed New Member

[Wild one]

2013 was the first year for the shutters

Only the 8 speed trucks have shutters,the 6 speed could be had up till 2019 in the trucks,and they never had shutters,
The OP has a 4.7,they never had the 8 speed or shutters,also the majority of 8 speed Warlocks don't have shutters

 

[Marshall]

I missed the 4.7 motor part .

 

[demonram]

If all else fails, take it to a shop and have the engine back flushed. My guess is the wrong coolant, but if you still have the problem after switching to MOPAR coolant, it sounds like it needs to be done. Make sure it's a back flush, not just a flush.