I have a custom Hummer H3 that needs the VIN numbers on modules changed to match the ECM. The hummer over laps the architecture change from GMLAN to Global A. Will the GM DPS work on these modules that overlap this timeframe? If not would anyone have any ideas on how to modify the VINs in the Hummer. I have a 2009 E67 ECM in my 2006 hummer and I am trying to get all of the modules to play nice with it. GM used two different ECMs in the hummer. 2006-2008 use one and 2008-2010 use the E67. Most all of the modules are the same between all years except the programming in them.

So you have a replacement ECU which was fitted to the later models?

And you want to change VIN in all original modules to match donor ECU?

Correct?

It shouldn't be hard to program with DPS using the standard ECM replacement procedure. Or you could use some tool for direct flash rewriting, for example, IOTerminal works really well.