Where is the heater core located?

2016 CHEVROLET 2500
250,000 MILES • 4WD • AUTOMATIC
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AVIGAIL5279
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Where is my heater core located and does the whole dash need to come off?
Jan 22, 2022 at 4:16 PM
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SQM
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Hello,

The heater core is located inside the HVAC box, which is behind the dash.
In order to access the heater core, the dash needs to be removed first.
It calls for about 10 hours of labor for a shop to do it.
So, it is fairly labor intensive. But it can be done using basic hand tools.

https://www.2carpros.com/articles/replace-heater-core

I have attached diagrams for your reference.

Please let me know if you have any questions.
Thank you.
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Jan 22, 2022 at 4:43 PM
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AVIGAIL5279
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Would it be the same for the 2016 LML 6.6 diesel?
Jan 22, 2022 at 4:54 PM
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SQM
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Yes, the process is same regardless of the engine or model.
Jan 22, 2022 at 5:09 PM
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SQM
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One more thing, this will require you to vacuum down and discharge the A/C system, before taking everything apart.

Here is a helpful video:

https://youtu.be/4EqdrBVb0sY
Jan 23, 2022 at 12:29 PM