2006 Corvette Z06: GM TechLink: Vehicle Identification Number
After the first 140 Corvette Z06s were built with a VIN Y designation for the engine, it was changed to VIN E. The LS7 engine is installed in all of the cars.
TIP: For these first 140 vehicles, it is necessary to use the letter E (instead of the Y on the plate)when specifying the vehicle in SI and on the Tech 2.
Source: GM Techlink, September, 2005
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