If so, can you tell me what ECM you have in your truck? I bought a complete '06 5.3L FFV(L59) from a recycler. I want to make sure they sent me the correct ECM before I send it out to Speartech for reprogramming(along with the rewire of the stock harness). Also, does this ECM also control the 4L60E? or was there a separate TCM?