Quick question what is the easiest way to tell what year and engine is, the 02 sensor would be my guess but where are they located. I have a 93ls but before i knew anything about our cars about 2 years ago i got a donor engine from a 97ls with 29,000 on it, at least thats what the mechanic documented in the papers. But my ecu reads DKLO1D KLO1 ( TN079700-3523 12V) could i be running a 93 ecu on a 97 engine. Thoughts , complaints, comments welcome!!!!!!