6l80 questions

[Clyde65]

Is there any difference between a 2013 and a 2015 6l80?

Found out my trans is a 2013, tuner says the pcm/motor is 2015 and won’t talk to the older trans, is this correct??

[Hart_Rod]

Originally Posted by Clyde65

Is there any difference between a 2013 and a 2015 6l80?

Found out my trans is a 2013, tuner says the pcm/motor is 2015 and won’t talk to the older trans, is this correct??

Quite possible. The tuner should b able to do a segment change within the tune to make it work.

[Clyde65]

I’m being told that it needs a flash to get the two systems to talk, idk, paid one guy to do it and he leaves to get a “GM” scanner and then calls me with, mine won’t work on your issue....I’m looking for that jerk now...

[Goats86]

Check with Brendan at lt1swap.com. He seems to be very knowledgeable.

[Clyde65]

Thanks

[Overdriven]

Originally Posted by Clyde65

Is there any difference between a 2013 and a 2015 6l80?

Found out my trans is a 2013, tuner says the pcm/motor is 2015 and won’t talk to the older trans, is this correct??

Originally Posted by Clyde65

I’m being told that it needs a flash to get the two systems to talk, idk, paid one guy to do it and he leaves to get a “GM” scanner and then calls me with, mine won’t work on your issue....I’m looking for that jerk now...

Definitely do some research at LT1swap, as Goats86 said, have a look at HPTuners forums too. I’m not an expert by any means but the tuner should be able to do a segment swap in HPTuners or just flash the ecu to a 2013 operating system if your engine was also available in 2013. Both are a little more complicated than a “standard tune” and not all tuners may be experienced with the process so be sure to ask your tuner questions.

[vannatta20]

The ECU and tcm need to have matching operating systems. The best way to do this is with gm tis reprogramming service. Hptuners can do a full tcm flash as well but you need the right operating systems. I can help if you haven't resolved the issue yet.