No, I'm running the original '07 ECM OS and an '07 XLR-V TCM. We tried '08 Denali, Escalade, and 2500 Suburban. None worked. So we're experimenting with various model years and trucks OS's. I think the key is to keep TCM and ECM model years and vehicle drivetrain platforms the same.
Trailblazer "RS" 5.3L 6L80
4x4 & '07 TBSS LS2 6L90 AWD
In an ideal world yes, it would be awesome to use the same platform for both ECM and TCM however the TrailBlazer guys are screwed as a 6spd was never a factory option. Too bad the T43 probably isnt like the LS1 PCM where EFILive added the platform options section to control the differences across the different models. Lets you change the alternator output on a V6 Blazer with a 0411 PCM swap running a Camaro OS for example.
The 07 -> 08 fan clutch difference is the 07 is ECM controlled, the 08-09s arent. Wouldnt throw a light going 07 engine -> 08 OS but going 08 enging -> 07 OS would.
Its a shame we dont know more about how the different TCM OSs interact with their ECM OS counterparts. Wish GM would have made it consistent, but noooo they have to make each one unique and cause this frustrating issue...grr.
~Erik~
2013 Sonic RS Manual - 1.4L I4T E78, tuned, turbo mods, etc.
2008 TrailBlazer SS 3SS AWD Summit White - LS2 E67/T42, bolt ons, suspension, etc.
2002 Chevy TrailBlazer LT 4X4 Summit White - 4.2L I6 P10, lifted, wheels, etc.
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