Does anybody know if a non-auto 4wd tccm will work in a Blazer equiped with Auto 4wd? I have isolated that my tccm is sending a false code to the pcm, telling the transmission that the truck is in 4wd low all the time therefore the shift pattern is always in 4wd low. I really do not care if I have auto 4wd for I never use it anyway. I would however like the other 3 buttons (2wd,4wd hi, 4wd lo) to work properly. I can find the non auto 4wd tccm anywhere but the tccm with the auto 4wd is almost impossible. Thanks for any advise!

 

It will not.