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Yes all input voltages are good grounds good id make a bet that the TCM is out again, but don't know what has caused it again. This is a government deal to the city, and i keep telling them need to find someone that knows something about them. I was with GM for over forty years but some of the...

I have a 2015 M997 when we first got it a couple of years ago it was fine for about 6 months, then trans went in to default light came on. While diagnosing the problem the trans control module felt a little warmer than i thought it should and it would just blink code 12. replaced the control...

Dose anyone have the part number for the Tech 2 adapter for the Transmission Control Module. The j44152 is just an extension harness. thanks if you do BAW

Ok it took a while but I got a new TCM for this truck and it fixed the problem but it seems to me that the TCM is getting to hot and that's without it being tucked away in its box. dose anyone if this is normal or has ran across this problem.

I have a 2011 997 that wont shift, think its in low maybe 2nd. Belongs to our police dept. batteries stay low because they wont buy a maintainer so they are always jumping it off. Problem started all of a sudden, when I got it battery terminals were loose batteries dead charged batteries got...