Thanks.I guess I should have been a little more specific.if I remove the chip and use an adp-019 (psop44 to dip32) to read it in my GQ4x4.then use the tunerpro xdf to make changes and reflash the chip and reinstall in pcm via surface mount zif.I ask this because I have most of this stuff already. I Do not own a cable to flash or read pcm through obd2 port.I do have a maxidiag obd2 reader that gives me o2 sensors.short and long fuel trims.iac.tps.etc so I can read live data.just want to be sure the files will work the same by reading/editing bin from the chip burner.I have a couple xdfs and looked them over.I don't have one for os 12201281which is what's on the service label.am I out of luck if I can't get that xdf.haven't seen one in searching.easy enough to go get another pcm with more supported os.lots at the yard I use.appreciate the help.