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06-11-2010, 01:00 AM
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#1 |
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Registered User
Join Date: May 2010
Location: Florissant, CO
Posts: 97
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Decoding stamped number on my 454
I want to know if the 454 in my truck is original or not. I checked on the stamping pad under the alternator and found the number CFS122531. Anyone have any info on this? All I've been able to find is muscle car stuff. Thanks for any help you can give me.
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1978 GMC Jimmy, 400, th350, np203 with part time conversion, Fibrecraft popup camper, soon to get a 14 bolt/d44 swap 2001 Yukon XL2500, 6.0, 4L85E, 4x4, family truckster |
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06-11-2010, 07:41 AM
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#2 |
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Registered User
Join Date: Jun 2008
Location: Lubbock, TX
Posts: 2,047
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Re: Decoding stamped number on my 454
You should be able to find a spot in that same area where the last 6 digits of the VIN are stamped. Sometimes they're tougher to read, they're not stamped with the same stamper that does the series you posted.
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06-11-2010, 08:12 AM
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#3 |
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Senior Member
Join Date: May 2004
Location: Binghamton, NY
Posts: 3,469
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Re: Decoding stamped number on my 454
I think the C means its out of a car. I had a that had some weird looking manifolds, thought it was from a car. Checked the numbers up front, started with a T, means a truck.
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2000 GMC CCSB 454/4L80 6” lift SAS 1999 Chevy CCSB 454/NV4500 4” SAS 1999 GMC Yukon 350/4L60 6" SAS |
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