Trying to Figure this car out miss matched serial numbers

Have a 2009 Pontiac G3 same as a Aveo 5 Thinking there was motor swap from a different US year model Sedan or maybe a reflash ECM or possibly a Sedan or Canadian 2010 with a ECM from a Sedan or Canadian 2011 or wanted to put a 2011 motor in it but?????? probably already has one a 2010 same as a 2011

KL2TD and KL1TD what does this designate Hatchback and Sedan. 8th number back from last one or 10th from the first count 8 or 10 doesn't matter it designates year of the model.

Looking on ebay for used parts Sedans have KL1TD and Hatch Backs have KL2TD


KL2TD66E39BXXXXXX Car # This is an 9 = # 2009


KL2TD66E39BXXXXXX Transmission # This is an 9 = # 2009


KL1TD5DE4ABXXXXXX Engine # This is an A = # 2010


KL1TG5DE7BBXXXXXX ECM # This is an B = # 2011