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1958 - 1981 Pontiac Tech & Restoration Firebird - GTO - Fullsize

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Old 03-18-17, 07:16PM   #1
Nascar-TA
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Default 71 Firebird VIN & Trim Tag matching

Hello I just looked at a 71 Firebird and decoded the vin and the trim tag.
The vin indicates that it is a formula and the trim tag indicates a base firebird. The colours and trim on the car seem to match the trim tag. Is there any where else that the vin might be stamped on the car? By the way it does have a formula hood.

Thanks in advance.
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Old 03-19-17, 12:48AM   #2
Mb125
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There should be a vin # stamped on the subframe. On the drivers side near the body mount on the side if I remember correctly.
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Last edited by Mb125 : 03-19-17 at 12:50AM. Reason: auto correct
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Old 03-23-17, 11:16PM   #3
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Thanks I will look
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Old 12-04-19, 02:12PM   #4
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The Vin is also stamped on the firewall under AC / Heater box.

On my 70 the Vin is Not matching and is off by a Few numbers in the build sequence.

I was told by a DMV specialist that this is a known issue that happened on more than one occasion he did research the issue and both vins as I was concerned that I had a stolen car when discovered.
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Old 02-14-20, 03:39AM   #5
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When you say "Trim Tag you mean the FISHER "body number plate"Yes?
A car could have been involved in a collision and the sub frame replaced with one from a wrecking yard donor car and those #'s might not match.
The rear axle housing ,if its the original, should also have the VIN stamped on the passenger side axle tube close to the center section.
1971 car it will be the 8.5" 10 bolt ring gear differential.
The front fenders should have the original VIN # stamped into them as well
Another source of authentication is the "IDENTOTAG" an early computer print out sheet on tractor paper that was stuffed into the car in several locations.
I found two for mine. One was stuffed into the springs of the passenger side bucket seat and the other was stuffed between the gas tank & trunk floor.
Sometimes they got stuffed up under the dash or under the back seat.
If the car is pretty much unmolested those print outs will still be there unless someone removed 'em.
Those printouts will have Every thing listed that the car came with,the assembly plant & will also have the VIN # in the box on the upper right hand of the sheet.

71 formula should have a VIN beginning with 22687 total production for 71 Formulas was 7,802.
Formula was available with 350 ,400 & 455 or 455HO

Base 6 cyl car (250 1v) would have a VIN# with 22387 - 2,975 total
Base V8 car (350 2v) would have a VIN# with 22387 20,047 total
Esprit (350 2v or 4002v ) would have a VIN# with 22487 20,185 total
Trans Am 455HO would have a VIN# with 22887 2,116 total

Sourcing a formula hood is not hard to do. They are available in reproduction or if you are lucky enough a wrecking yard (not so much anymore. The original Formula ram air air cleaner assembly is available in reproduction now too.
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