Trying to find actual ethylene glycol is almost impossible these days and due to the 3.7(or any engine in the KJ) uses a aluminum head on a iron block so you'd have to change the coolant once a year or the coolant turns to acid.Ethylene glycol is high silicate based.
Your cooling system is designed for a silicate based coolant and HOAT coolant is silicate based but can last longer with the different metals your engine is made out off before you need to change it due to acidity levels.
OAT coolant(any "universal","all makes/models",and dexacool) is silicate free and likes to eat some forms of plastic(google dexacool and 3.1/3.4 GM V6's),so happens the water pump impeller on the KJ's water pump is the same plastic that does not agree with OAT coolants.You also can not mix OAT coolants and HOAT coolants,cancels out there protective additives when done so.
Just use the correct coolant.