4L80E in 2008 GMC Sierra...
Thread Starter
formerly BlacKSS2oo2 (9-20-2012)
Joined: Feb 2004
Posts: 135
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From: houston, tx
4L80E in 2008 GMC Sierra... I fried my 4L60E. Have a 4L80E coming. I understand that my truck has a separate TCM that controls the transmission. Support at HP tuners informs me that I need to have the TCM flashed with the Tech2. My question is that what exactly do they need to do? I went to the local dealership and they said that I was speaking chinese. If possible could someone explain the process of flashing the TCM with the tech2. Is this the only way to calibrate/run the 4L80E in my truck? What other information/steps do I need to do? I have read tons of posts on older style PCM/TCM calibrations, just not really and tech articles out there for the newer trucks.
VCM OS ID: 12617631
TCM OS ID: 24239927
Any help would be appreciated....
Thanks!
VCM OS ID: 12617631
TCM OS ID: 24239927
Any help would be appreciated....
Thanks!
Registered User
Joined: May 2012
Posts: 5
Likes: 0
Option1- flash it with a file from a 2008 express van 4.8/4l80e, the flash it back with your stock file and when its about to flash the TCM cancel the the flash disconnect the interface, connect and read, save the file
Option 2- borrow a tcm with the calibration for the 4l80E install it on your truck, do entire read it with hp tuners, install your original TCM and do an entire write
Option 2- borrow a tcm with the calibration for the 4l80E install it on your truck, do entire read it with hp tuners, install your original TCM and do an entire write
Registered User
Joined: May 2012
Posts: 5
Likes: 0
I flashed the calibration from the express van and had to spend 2 credits to license the file, so its cheaper if you can borrow the TCM from someone that has the TCM with the right calibration
Last edited by AJR; Sep 21, 2012 at 08:36 PM.
