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View Full Version : Old OS for 2007 5.9 with WTS and derate issue



msantwire
September 25th, 2017, 01:49 AM
Hello,

Can anyone help me out with finding the right OS to flash back to the original OS that does not do the system leak check. Truck has too many new parts to list and the issue still presents itself.

Thank you,
Matt Santwire