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TrailblazerSS
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Discussion Starter #1
Well after 3 months of working on the truck and build the motor and everything else. I was finally able to start up my new swap. Just to unlock a new can of worms. For whatever reason when using HP tuners or any other scanner I can’t communicate to the computer while the car is running my Aeroforce gauge won’t even power up. Here’s the old part, when I Put the key into accessory everything works and I could scan/talk to everything perfectly. I read some of the post on here and on HP tuners. I disconnected the battery and the computer and checked all fuses just to make sure nothing was off. Went back to hook everything back up and tried it again, now the TCM does not communicate and lose of communication code came out. Does any have tips or anything that might be helpful?
 

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07 tbss awd
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1,293 Posts
Sounds like you may have an operating system mismatch between your ECM and TCM. Which TCM did you use for your swap? Lc32? Or something else?
 
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