GM rebuilt your transmission after the infamous wave plate failure and you figured you were good for another 100K. Wrong, suddenly you have the familiar check engine light and transmission won't shift past 2nd gear.
2012 GMC 3500 TCM CONNECTOR ENDVIEW CODE
You'll have another P0700 code along with some sort of shift solenoid failure. In my case it was a P0752, but there’s several switches on the module that could fail and trigger similar codes. This is another flaw in the GM transmission that may have been exacerbated by the wave plate failure. The way it knows what speed the input is going is by how fast the voltage is. So the TCM actually grounds the circuit through the TCM ground but the TCM is in between the sensor and the actual ground. The TCM sends the power, the sensor just alters the voltage and sends it back to the TCM.
The Transmission Electro-Hydraulic Control Module, often called TEHCM or TCM, is another non-robust part in the terrible transmission on these things. Which means the circuit starts and ends at the TCM. The TEHCM is a multi-purpose part that acts as the transmission control computer along with some sensors and shift solenoids. It lives inside the transmission and swims in the transmission fluid. So, the metal particles flowing through your transmission during the wave plate failure, or any overheat conditions, will weaken the TEHCM also. GM doesn't always help on these, so you're probably on your own to pay for the repair. Even with GM's help, this is an expensive transmission to get 120K miles out of.Ĭoincidentally that's the same amount I had to pay out-of-pocket for the wave plate failure rebuild. To replace these simple and inexpensive parts, you also have to replace the more expensive parts contained in the rest of the module. GM charges 650 for a TEHCM and the dealer will want 1400 or so for the entire repair. The shift solenoids (or switches depending on the document you’re reading at the time) just kind of fall apart. 20 TCM CONNECTOR ENDVIEW CODE 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. The repair involves replacing the module, some gaskets, and reprogramming the TEHCM.
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