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Old 04-30-2023, 08:01 PM
big matt's Avatar
big matt big matt is offline
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Join Date: Dec 2007
Location: N.E. Cleveland
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Default Heater core

So how bad is it to replace a heater core in a 73 g/a with ac? Anybody have any tips. Gotta do it. I just am looking for pointers. Thanks

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1970 Formula 400 4 speed
2006 Gto. Ls2/m6
1972 Gto 455ho/th400 post coupe
1973 Grand Am 400 4 speed
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Old 05-01-2023, 05:38 PM
73gtolive 73gtolive is offline
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Default

My seats, console and everything was out so it was good timing for me. Not that hard just tedious and not a lot of room to work.

There are a couple hidden nuts to look for. If you have a service manual it will help locate them. I am having trouble remembering now, but I think the blower motor resistor had to be removed for access to one of them.

I actually did mine twice as I decided to replace my firewall insulation after doing it the first time. So, if your insulation is in bad shape, you may want to consider that while it is out. That is also a lot of work but you have about half of it done with pulling the heater box.

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Old 05-01-2023, 07:00 PM
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big matt big matt is offline
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Thanks for the tip. I will order a 73 service manual, and i do plan on removing the seats. My car is a manual but console delete. So thats a plus. I guess i will start on it this weekend and see where i get.

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1970 Formula 400 4 speed
2006 Gto. Ls2/m6
1972 Gto 455ho/th400 post coupe
1973 Grand Am 400 4 speed
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