Downloaded my 06 LBZ program (OS 12616698).
I removed the "Fingerstick" but retained the EGR blocker plate, so I modifed the following values to clear the P0401 CEL:
B1501 Disable
B1502 100
B1503 140
B1504 -40
B1505 -1
B1506 100
Changed H0136 value to 587 for 315-10-17 tires.
Am I on the right track so far?
My ultimate plans are for a good gas milage tow tune. (I also noticed that in many EFILive tune "librarys" sites there are very few 12616698 files).
Doing this in "baby steps"...
Ray