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Anyone in here a tuning guru efilive or hptuners

Scottie

Well-known member
Joined
Mar 25, 2023
Member Number
6319
Messages
67
Loc
Seattle Wa
I have a duramax(lgh)/6l90 combo in my van, and wondering if it is possible to get trans tuning in it?

Hptuners doesn’t seem to work. Cannot read ecu. I have efilive ecu tuning in it.

I put in a support ticket with hptuners, they said that I need to flash to stock and read both ecu/tcu together and then I should be able to tune.

Tried that and still cannot read ecu. Further research is telling me that the lml/lgh ecu cannot be read.

Haven’t found anybody who knows anything about tuning 6l90 in this platform. None of the duramax tuners tune the 6l90, but efilive does show that it is supported.

Thanks for any help.
 
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