Wiring diagrams for transmission and the TCM control module?

More than likely, you have a short in the wiring. So, we need to use this testing to figure out what is happening.

What transmission do you have? More than likely, it is the 4L60 but if you have the 6 speed then the testing is slightly different so we would need to know that.

Please see this testing and let me know what questions you have but if this code was there prior to the replacement and still there no and you cannot communicate with the TCM then it sounds like a wiring issue that we are going to have to track down.

Thanks

Please post your new question here, you must be logged in.

https://www.2carpros.com/questions/new

Cheers, Ken