Re: Heater Core Outlets. Which is Which ?
Some of the 88-94 trucks had one of the heater hoses going to the radiator.
If you buy any kind of factory replacement radiator, you will find a 5/8" barb sticking out of the radiator(between the rad cap and the upper fitting for the trans oil cooler. They supply a cap if you don't use the fitting on the radiator.
If the old one was at the radiator, that's where I would put the new one.
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