Yes I have the kit also. I first tried to plug in the Vue with all of the Goblin connectors and got a no crank condition and getting a data logger to connect was problematic although it would occasionally connect . With the none of the Goblin connectors plugged in I could start it but had a MIL and I think it was in reduced power mode. With the main power connected to the Vue and the Goblin plugged into the Cobalt PSCM, it started without a MIL and just had a power steering message on the Instrument Cluster that cleared when I hit the DIC button.
The older Cobalts may have had their GMLAN components in a different order and the PSMC may have not been at the end of the chain which is where it needs the 120ohm resistor. It might even have had separate resistor that wasn't built into a module at all.
It looks like Brian74 is maybe using an 09 BCM and PCM so that may be why he had to add the resistor. I haven't read his entire build thread, but I did find where he bought the 09 modules.