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Gm engine serial number lookup7/3/2023 The point of this article is to help you figure out how to decode stuff. Lastly, in extreme cases, you'll want to verify the numbers stamped onto the component were the ones stamped into it originally and aren't restamped. ![]() You need to decode the engineand see if it matches the vehicle, and if the code signifies Z28 or SS equipment. Numbers matching is important when you're trying to decode a Z28 or Super Sport where the VIN won't identify the vehicle as such. But numbers correct is not numbers matching. Where is the serial number on a small block Chevy The identification numbers on a Chevy engine with a small block V-8 are adjacent to the cylinder heads. If you know your engine serial number, you can find out the exact parts your engine was built with when it was first made. Some folks use these terms loosely, or will say 'numbers correct' or something to that effect. No engine that exists has the same serial number as another engine. If it does - it's 'numbers matching',otherwise - it's not. ![]() The partial VIN will match the vehicles VIN. The first table at right is for pre-54 235 CID engines. This match is done via the PARTIAL VIN stamp on the component. Although the engines casting number (casting numbers are available at Inliners) will give you detailed information about where and when your engine was made, the serial number prefix is pretty easy to read and will at least get you started correctly. When people say 'It's numbers matching' - what they mean is the engine (or other component, i.e the transmission) can be MATCHED to the vehicle it was originally used in. ![]() This is my opinion, and the generally accepted norm:
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