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12-08-2020, 10:31 PM | #1 |
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1955 GMC - Another interior mystery hole question
I feel like a moron constantly displaying my ignorance, but what is this? The hole above the rocker kick panel vent. Looks like something is supposed to screw in there. A speaker? It’s not there on the drivers side.
Last edited by UmmYeahOk; 12-08-2020 at 10:35 PM. Reason: Wonky picture |
12-08-2020, 11:11 PM | #2 |
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Re: 1955 GMC - Another interior mystery hole question
That’s the fresh air intake for the heater. I believe just the deluxe heater.
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12-09-2020, 09:12 AM | #3 |
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Re: 1955 GMC - Another interior mystery hole question
Fresh air intake for the deluxe heater. There is a flange that screws on . If you have a standard heater there is a delete plate.
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12-09-2020, 01:30 PM | #4 |
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Re: 1955 GMC - Another interior mystery hole question
Yes, that is the opening for the deluxe heater fresh air intake. Air comes from the cowl area between the hood and windshield - same as the vents. On the heater there is a flap inside you can adjust to get air from either outside (fresh) or inside (recirculate). Here's picture showing the install. This is looking at the firewall from under the hood if you were by the right front fender. Your "hole" is where the "inlet assembly" connects to.
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12-09-2020, 02:23 PM | #5 |
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Re: 1955 GMC - Another interior mystery hole question
Thanks a bunch guys. Really helpful. Our truck was basically a shell, and we’re both too young to have seen these in their prime.
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12-10-2020, 05:27 PM | #6 |
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Re: 1955 GMC - Another interior mystery hole question
As mentioned, the deluxe heater picks up fresh air there. There should be a flange which screws to the cowl. A rubber seal actually connects the heater to the flange.
Here's the instruction page from the 1957 Chevrolet Passenger Car and Truck Accessories Installation Reference Manual: http://chevy.oldcarmanualproject.com...cpctai108.html Here's the heater installed: |
12-10-2020, 06:50 PM | #7 | |
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Re: 1955 GMC - Another interior mystery hole question
Quote:
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12-10-2020, 09:56 PM | #8 |
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Re: 1955 GMC - Another interior mystery hole question
I sold a heater like that from my 57 GMC, the guy was more than thrilled to get a complete original system. seems like there are more standard ones out there.
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12-10-2020, 09:57 PM | #9 | |
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Re: 1955 GMC - Another interior mystery hole question
Quote:
Can't be. I still have too many things I want to do! |
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12-10-2020, 10:11 PM | #10 |
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Re: 1955 GMC - Another interior mystery hole question
oh he did big time
we should run by his house and egg the windows
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12-11-2020, 12:09 AM | #11 |
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Re: 1955 GMC - Another interior mystery hole question
And if TP wasn't being hoarded you could do that too
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12-11-2020, 06:04 PM | #12 |
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Re: 1955 GMC - Another interior mystery hole question
most of our trucks came with standard heater.
there would have been a blank cover over the hole
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12-13-2020, 10:23 PM | #13 |
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Re: 1955 GMC - Another interior mystery hole question
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12-14-2020, 06:38 PM | #14 |
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Re: 1955 GMC - Another interior mystery hole question
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12-14-2020, 08:16 PM | #15 |
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Re: 1955 GMC - Another interior mystery hole question
the deluxe heater if all is working well and well sealed ---is pretty good !!
i went thru the one i have completly with no issues .....itll cook ya |
12-15-2020, 01:58 PM | #16 |
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Re: 1955 GMC - Another interior mystery hole question
my memories of the stock heater differ. i remember driving in a sub-zero snow storm and freezing my nads off. had to get out every 20 minutes to scrape the ice/snow off the outside and the ice off the inside. brrr. i was never warm in any tf truck. bought my 1st tf truck as a high school freshman in WI, 2nd at 18 in CO, 3rd at 19 in san Francisco (no heater), 4th at 25 in NC, 5th and current at 30 in NC. i don't remember any of them with a decent heat
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12-16-2020, 12:56 PM | #17 |
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Re: 1955 GMC - Another interior mystery hole question
My experiences with the deluxe heater are good. I used it in northeast Indiana where it can get pretty cold in the winter when I was using my '57 as a daily driver. It worked especially good AFTER I sealed up all the holes in the firewall with duct tape!! (Those will be properly taken care of next iteration) But then again I was younger, more resilient and dressed appropriately. Defroster worked decent albeit not a dehumidified one like today's cars. For a system 60+ years old it's not too bad.
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12-17-2020, 01:12 AM | #18 |
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Re: 1955 GMC - Another interior mystery hole question
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12-17-2020, 12:49 PM | #19 |
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Re: 1955 GMC - Another interior mystery hole question
i try not to do that stuff, my apologies
still gonna egg your house
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12-17-2020, 02:14 PM | #20 |
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Re: 1955 GMC - Another interior mystery hole question
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12-20-2020, 01:27 PM | #21 | |
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Re: 1955 GMC - Another interior mystery hole question
Quote:
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12-21-2020, 02:55 PM | #22 |
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Re: 1955 GMC - Another interior mystery hole question
Here’s what the recirculating heater looks like. It does not use the hole referenced by the OP.
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