matt20136d9
03-03-2023, 08:54 PM
Hello I have a 2003 suburban 1500 5.3l 4l60e 4x4 it has the p59 pcm engine code l59 with os 12579405, any chance anyone has an xdf for that? I have read and saved the stock file, anyone got some good performance calibration files I could get to write and try out. I have a back up pcm and a bench harness