Transmission Replacement
- Thread starter 4stang6
- Start date
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Ibustbravo
Member
She shop should reprogram the controller, they're located on the valve body of the trans on the 6L80. If it's an 8L90 the controller is external. The 6L80 trans controller is a T43 and the 8L90 is a T87..
For the 6L80, You can use HP tuners or GM GDS2 with a Service Programming System (SPS2), subscription. For the 8L90, your options are to unlock the TCU through Hp tuners; which means you have to send it in, or use the GM GDI2..
I use these tools --> HP tuners, GDS2 and an alldata.com subscription. That pretty much covers everything within the limits of my knowledge.
C
For the 6L80, You can use HP tuners or GM GDS2 with a Service Programming System (SPS2), subscription. For the 8L90, your options are to unlock the TCU through Hp tuners; which means you have to send it in, or use the GM GDI2..
I use these tools --> HP tuners, GDS2 and an alldata.com subscription. That pretty much covers everything within the limits of my knowledge.
C
No reprogramming needed if whomever you purchase it from looks up your VIN and matches the TEHCM part number in the replacement trans to your current transmission's TEHCM. You just need to do a fast adapt relearn. Any bidirectional scan tool w/adapt reset functionality will work.
I'm going to replace the 6L80 in my 2015 Tahoe and the transmission needs to be re-flashed also. What did you end up doing about yours?
When I re-flash, I'm leaning toward purchasing whatever diagnostic tool and software I need to fo this myself VS calling a tow truck and taking it to the dealership. Does anyone have advice on what diagnostic equipment I will need?
The OP never came back, and hasn't been on here in over a year.
