Last 2 or 3 digits = Engine Suffix code.4th and 5th digits = day of the assembly.2nd and 3rd digits = month of the assembly.The engine serial number in big and small Chevy engines is denoted by seven digits, each symbolizing a specific detail.īelow is the meaning of each of the letters and numbers in the engine serial number: It contains information about the vehicle’s assembly, power output figures, the make and model of the Chevy vehicle, as well as the engine displacement. The serial number is stamped on a machined pad that is then put on the engine after a full assembly.
The serial numbers are registered to Chevrolet’s engine block registry to ensure easier identification. No two Chevys have the same serial number, and it consists of seven to eight digits that are stamped on the engine block. Credit: Ī Chevy engine serial number is a unique ESN (electronic serial number) used to identify every Chevy vehicle. GM/Chevy Small/Big-Block Engine Serial Number What Is Engine Serial Number? A Chevy engine serial number is a unique ESN used to identify every Chevy vehicle. Note: For the year, more info is needed as the 7 can mean 67, 77, 87, or 97. On the driver side ledge (on some later blocks) On the passenger side of the block near the freeze plug (in some earlier production blocks from the 60s) or At the back ledge of the block behind the passenger side cylinder head, next to cylinder #8 or Notes: Car & Truck, 2-bolt, Passenger stick 1-piece seal On the passenger side ledge, next to cylinder #8 (on some later production blocks) At the back ledge of the block behind the driver-side cylinder head, next to cylinder #7 or Last 6 Digits = Equal the last 6 digits of the vehicle’s VIN.Ġ12345 = The last six digits of the vehicle's VIN At the front passenger side of the block, next to cylinder #2 or - On the flat block just above the timing cover (in some truck or marine blocks) On the flat block just above the timing cover (in some trucks or marine blocks)Ģnd and 3rd digits = month of the assembly Ĥth and 5th digits = day of the assembly At the front passenger side of the block, next to cylinder #2 or
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