The repair involves replacing the module, some gaskets, and reprogramming the TEHCM. GM charges $650 for a TEHCM and the dealer will want $1400 or so for the entire repair. To replace these simple and inexpensive parts, you also have to replace the more expensive parts contained in the rest of the module. The shift solenoids (or switches depending on the document you’re reading at the time) just kind of fall apart. Even with GM's help, this is an expensive transmission to get 120K miles out of.
Coincidentally that's the same amount I had to pay out-of-pocket for the wave plate failure rebuild. GM doesn't always help on these, so you're probably on your own to pay for the repair. So, the metal particles flowing through your transmission during the wave plate failure, or any overheat conditions, will weaken the TEHCM also. It lives inside the transmission and swims in the transmission fluid. The TEHCM is a multi-purpose part that acts as the transmission control computer along with some sensors and shift solenoids. The Transmission Electro-Hydraulic Control Module, often called TEHCM or TCM, is another non-robust part in the terrible transmission on these things. This is another flaw in the GM transmission that may have been exacerbated by the wave plate failure. In my case it was a P0752, but there’s several switches on the module that could fail and trigger similar codes.
#2012 GMC 3500 TCM CONNECTOR ENDVIEW CODE#
You'll have another P0700 code along with some sort of shift solenoid failure. Wrong, suddenly you have the familiar check engine light and transmission won't shift past 2nd gear. GM rebuilt your transmission after the infamous wave plate failure and you figured you were good for another 100K. So, you thought your transmission woes were over.