I have a 2010 impala LT with the 3.5L flexfuel engine(LZE) Looking on craigslist for parts I ran across someone selling a 3.9L with the trans, subframe, harness and ECM/TCM from a 2010 impala police car.
Would it be plug and play or is there some differences like in the wiring/programing that make it not work?
Would it be plug and play or is there some differences like in the wiring/programing that make it not work?