Hi everyone , havent been here in a bit . I finished my second swap of this sort , lq4 in a 98 suburban with a 411 pcm. Lextech was great when i did my first one, lots of help. Everything is great and it runs fine but i am just wondering about a U1255 dtc which is lose of communication between moduals i am getting , i looked in my tune and the procession and mil is turned off for that so i imagine the BCM is looking for the old PCM and is setting that code, is it possible that the BCM could set this code . Thank you . eric