I have a 2008 Trailblazer SS (E67, OS 12618164).
I bought a E67 from a 2006 Impala 3.5 (E67, OS 12604996). I then used GM SPS to write the PCM for 2007 Trailblazer SS (E67, OS 12611938). I then read the ECM and used HPtuners to apply code modification (E67, OS 1250241). I did all of this using a bench harness with just the E67 connected, nothing else.
Will this E67 now run my 2008 Trailblazer SS? The Pinout between 2007 and 2008 Trailblazer SS appears to be identical. Will I need to modify VATS? Will the VIN being different cause an issue? Will communication to TCM (T42), EBCM, instrument cluster, and other Class 2 stuff work fine? If I change the VIN using a tool (not sure which yet, hptuners won't do it...) to my correct 2008 VIN (on a 2007 OS) will there be any issues? Basically is this plug and play? Seems too simple...