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Most of the aftermarket radiators will have provisions for both a transmission oil cooler and the enigne oil cooler. Not all models used both. If you look at the link above you will see the AC Delco radiator with both sets of ports and the alternate part numbers. Some of these come with a spare set of fittings that can be changed out to fit the application or the fittings off the old radiator can be transferred to the new.
Warning only change one fitting at a time or the tank will drop into the raditor and lose its seal.
Let me know if that is clear.
Yes, it may be a tow package. Part of replacing the radiator is seeing if the fittings are correct, sometimes you have to swap them over. I don't understand why they didn't just do that and returned the radiator?
The base threads are all the same and the aftermarket does try to cover all the combinations in the fewest part numbers. If they wanted to they could order by vin from the dealer and wait for the rad to come in but that will be about triple the price of a quality aftermarket rad.
By returning it rather than changing the fittings to the correct ones they have wasted more time than it would be to just do the swap.
I don't have all 17 part numbers that GM engineers decided were needed to cover all the variations of the rad for all the trucks (engineers like to change from year to year to get their bonus) and have learned over the years to just roll with it and do what needs to be done to repair the vehicle.
If you wanted a part history for exactly what fitting was used and what year it was changed that information is not available outside of GM engineering.
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