Hi,
The heater core on this vehicle really isn't a known issue. However, if the cooling system isn't serviced properly, it can lead to it getting plugged. Also, if someone mixed traditional "green" coolant to the factory Dexcool coolant, that will cause all kinds of issues.
As far as the heater core, it is located in the vehicle under the dash. To get you started, here is a link you can use as a guide. It explains the procedure in general and can be very helpful.
https://www.2carpros.com/articles/replace-heater-core
If you look at the attachments below, they provide the directions for removal and replacement specific to your vehicle.
I hope this helps. Let me know if you have other questions.
Take care,
Joe
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Sunday, December 5th, 2021 AT 7:14 PM