4l60, no 4th or TCC

[miguelc]

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

[flame]

Sounds like a bad shift solenoid. You can replace it with just a pan removal. I don't remember which is A or B but there cheap so just replace them both.