Greetings
2007 silverado, I just installed a 2500 vigilante. Truck shifts 1-2,2-3 it never goes on 4th or locks TCC.
It shows code: selenoid A low
I tried VCM controls: and TCC does work, 1st and 2nd I can hear selenoids working, 3rd and 4th I cant hear them.
Before I go and tear my transmission ... could it be the tune
Thanks