Operation CHARM: Car repair manuals for everyone.

Engine ID and VIN Derivative Location



Engine ID and VIN Derivative Location

4.3L Engine




1 - Engine Identification Number
2 - Alternative Engine Identification Number

Located on the VIN plate, the VIN provides detailed engine identification and code information by liter and by the engine code letter.

6.5L Diesel Engine





The engine unit number or date code is either laser etched or stamped into the engine block.

5.0L and 5.7L Engines





All engines are stamped with an eight digit engine identification number.

7.4L Engine





Engine ID




1 - Source Code
2 - Month of Build
3 - Date of Build
4 - Broadcast Code