Th gryphon will see the P1000 code because I've had it come up when I returned to stock. I was thinking that the cause of your lack of code could be from differences in year model but it looks like we are all in the same '04-'08 year bracket (or at least Jack and I do). I guess that is a quirk that your two trucks have. Kinda like my speedometer is right on with the gryphon display among other things.
