[HaveBlue]

I ran across this. Thought it might prove informative.

http://www.sandyblogs.com/techlink/2...em-update.html

With the recent arrivals of the 2010 Camaro, LaCrosse, Equinox, Terrain and SRX in dealerships, technicians have had their first experiences in diagnosing GM Global Architecture (Global A) vehicles using the new GM Global Diagnostic System (GDS). These vehicles do not permit Tech 2® communication for diagnostic purposes.

The Global A models using GDS are truly globally-designed vehicles. They are built around the world for several different markets. This requires vehicle systems to meet the requirements of varying regulations in different markets, some of which can have an effect on the way vehicles are typically diagnosed and serviced half-way around the world.

One recent issue experienced in dealerships may be a no start condition after swapping an ECM or other module from one Global A vehicle to another.

The Global A system does not allow controller swaps between vehicles. This includes these modules: ECM, BCM, EBCM, SDM, ECC and IPC.

If a module on a Global A vehicle is swapped out, it will result in a no start condition in both vehicles because the module security codes do not match.