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Author Topic: Factory lettering on frame?  (Read 1153 times)

Offline Swampyankee74

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Factory lettering on frame?
« on: November 27, 2022, 05:16:28 PM »
I'm cleaning up the fuel tank, brackets and such. My 4 year old son is running around with a puddy knife scraping the frame. He says "it says something here daddy".
Anyone ever seen this? It is on the driver's side frame raile between the front and rear cab mount on the top of the frame says "FY5718-100" I might be wrong on the first two letters. Any info on this??
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Offline Swampyankee74

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Re: Factory lettering on frame?
« Reply #1 on: November 27, 2022, 05:20:44 PM »
H
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Offline VileZambonie

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Re: Factory lettering on frame?
« Reply #2 on: November 27, 2022, 06:18:40 PM »
I've never seen any factory markings like that. Perhaps your truck had a frame swap? Did you check the frame vin to see if it matches your cab's vin?
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Offline Swampyankee74

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Re: Factory lettering on frame?
« Reply #3 on: November 27, 2022, 06:41:23 PM »
I where would I find this vin# on the frame?
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Offline VileZambonie

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Re: Factory lettering on frame?
« Reply #4 on: November 27, 2022, 06:44:37 PM »
74 should be a top of the frame rail near the steering box.
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74 GMC, 75 K5, 84 GMC, 85 K20, 86 k20, 79 K10

Offline Swampyankee74

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Re: Factory lettering on frame?
« Reply #5 on: November 27, 2022, 06:47:57 PM »
Found it on the frame. My cab is in different building. Going there nos to check  now
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Offline Swampyankee74

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Re: Factory lettering on frame?
« Reply #6 on: November 27, 2022, 06:52:28 PM »
H
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Offline Swampyankee74

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Re: Factory lettering on frame?
« Reply #7 on: November 27, 2022, 06:53:36 PM »
T41505500
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Offline Swampyankee74

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Re: Factory lettering on frame?
« Reply #8 on: November 27, 2022, 07:04:07 PM »
The vin matchesd
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Offline Swampyankee74

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Re: Factory lettering on frame?
« Reply #9 on: November 27, 2022, 07:10:08 PM »
H
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Offline Swampyankee74

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Re: Factory lettering on frame?
« Reply #10 on: November 28, 2022, 04:52:01 PM »
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Offline Swampyankee74

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Re: Factory lettering on frame?
« Reply #11 on: November 28, 2022, 04:57:43 PM »
First two letters are fx like in that other post
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Offline VileZambonie

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Re: Factory lettering on frame?
« Reply #12 on: November 28, 2022, 05:44:57 PM »
Neat, no idea what it means though.
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74 GMC, 75 K5, 84 GMC, 85 K20, 86 k20, 79 K10

Offline Swampyankee74

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Re: Factory lettering on frame?
« Reply #13 on: November 28, 2022, 08:11:55 PM »
Yes, definitely strange, especially with no info out there on it
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