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Just a quick note that I was able to bench re-flash the OS of a 2007 T43 to 2009 OS by using the GM TiS2Web SPS and the Speartech harness. I had my E67 on the harness as well. Different VIN in both, didn?t matter.
I was unable to find if this was possible to do in specific detail, so I just did it, worked fine. Heard bits and pieces saying it was OK.
Thanks a lot for letting us know! This is really useful info!
Gravy.
I can offer the same for free for anybody else wanting the same now that I paid. That specific subscription is good for a while now, I think 2 years. Just pay for the shipping of the T43 module both ways. This is specifically to re-flash any 2007 or 2008 6L80e T43 internal TCU from their 2007 or 2008 operating system, to the 2009 operating system, as found on a 2009 Cadillac Escalade 6.2L. Just send me a PM. GM's $40 per VIN is easy to overcome, but not many people have a GM MDI at their work like I have access to, so happy to help.
Here is a pic of doing so last night. Just wheeled the entire trans to my desk. Ha!
Attachment 94104
what is the advantage of the 2009 OS over the 2007-2008?