05 Truck PCM's not flashible?

If that's a drive by wire throttle body, I believe they have to do a calibration on that and also do a vin flash into it.

Yes, you can flash it. They have to flash it in order to do software updates that are known to happen. But the throttle cal has to also be done with it and the vin flashed I guess. I had to have this done with an aftermarket pcm I put in my turbo caliber which is an 08. Hopefully this is useful info.