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Originally Posted by
400ss
The colorado i worked on was a 2012 model and the 6l80E was a 2011 or 2012 model im not sure it was from a 5.3L 6L80E Silveado,, you need to remove the engine harness, it has integrated the trans harness,, you need to remove all the wires of the T42, then you need to convert it to 6L80E harness, it is simple. im pretty sure it will work just fine, if the colorado you are working on is a 2009 model, just try to use a 09 6L80E or you can flash it with a Tech2 for a 09 calibration,, everything will work perfectly, PRNDL, cruise control and everything, the only thing that is not gonna work is the Manual mode or Sport mode , you can make it work but you need the pads and the silverado BCM and is more work, You need to read the ECM and then the TCM or the TCM and then the PCM, because they are diferent modules, if cant do the Harness part i can do it for you for free, you just need to pay the shipment, right now im on mexico but i can do it you just need to send it to me, i dont have nothing to do right now so im bored,, if you want to keep the 4x4 buttons you need to keep the colorado transfer you need to take the trans to a trans shop and tell them to remove the trans output shaft take the output shaft to a machining shop and give them the transfer and the output shaft tell them to machine the shaft to fit on the input of the transfer