Replaced TCM, transmission shifts fine, worked well for about 3 weeks, now all gauges, speedo, tach, idiot lights, as well as "no bus" displayed in the odometer, plus automatic temp control not functioning when the "no bus" displayed. This cycles with everything working intermittently, and the shifter location also cycles with the correct position lit, to all lit at the same time.

I have unplugged and reseated the plugs on the Main computer, TCM, and BCM. Are these glitches caused from the BCM since the transmission shifts properly, or since this is a reconditioned TCM that was installed, could it still possibly be it or both?

Any help would be appreciated Kevin.

Thanks in advance for your help,
Greg