Hi John,
You might want to make a quick check of the can buses - the SKREEM is the termination for (I think) CAN BUS B - you check it at the ECU, pins 4 and 11, connector still plugged in, probing the back of the connector (but look at the wiring diagram to be sure), ignition off, no key, should read ~60 ohms. Then the CAN BUS is between the BCM and the CLP - check it at the BCM (I don't remember the pin numbers) - it should also read ~60 ohms. If either reads 120 ohms or 10k ohms, you might have a problem with your wiring.
-Jerry