Heater core removal

2004 GMC TRUCK
200,000 MILES • 6.0L • V8 • 4WD • AUTOMATIC
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CLINT TREEN
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  • 1 POST
I have removed dash and fire wall nuts and screw but I still can't get to heater core.
Dec 25, 2019 at 1:33 PM
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.
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ASEMASTER6371
  • AUTOMOTIVE REPAIR CONTRIBUTOR
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Good afternoon,

Do you have the heater box released? If not, can you post some pictures of where you are?

Roy
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Dec 25, 2019 at 2:03 PM
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ASEMASTER6371
  • AUTOMOTIVE REPAIR CONTRIBUTOR
  • 52,796 POSTS
I attached a YouTube video of the procedure for you.

It is better than the pictures that are provided in the manuals. It is an hour long but very good information.

https://www.youtube.com/watch?v=p9t7fRUs3uA

Let me know if you have any other questions.

Roy
Oct 12, 2020 at 4:31 AM
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DRAGONLEN
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  • 1 POST
I have a Jimmy that had a leaking heater core. I took it in for repair and they said now after repairing the heater core it won't start and needs a new body module. It started fine before I took it in. Is this possible?
Oct 14, 2020 at 2:14 PM (Merged)
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HMAC300
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i kind of doubt it, scan for codes and check fuelpressure. also try to reste the secuirty system they may have screwed something up when they pulled the dash out.
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Oct 14, 2020 at 2:14 PM (Merged)