Heater core removal

CLINT TREEN

MEMBER
2004 GMC TRUCK
6.0L
V8
4WD
AUTOMATIC
200,000 MILES

I have removed dash and fire wall nuts and screw but I still can't get to heater core.

Wednesday, December 25th, 2019 AT 1:33 PM

4 Replies

ASEMASTER6371

MECHANIC
52,797 POSTS

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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Wednesday, December 25th, 2019 AT 2:03 PM

ASEMASTER6371

MECHANIC
52,797 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

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Monday, October 12th, 2020 AT 4:31 AM

DRAGONLEN

MEMBER
1 POST
1999 GMC TRUCK
160 MILES

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?

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Wednesday, October 14th, 2020 AT 2:14 PM (Merged)

HMAC300

MECHANIC
48,601 POSTS

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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