Thought that it was the dash switch again. Replaced it and its still flashing.

The t-case actuator is $360+

What's next? Dash buttons have no lights

2004 3/4 ton 4wd 6.0 4L80

 

Not totally sure, but look into transfer case control module... or something along those lines. Depending on your condition, it may be the problem. Hard to tell otherwise. But do some research on it first

 

have you messed with any of the connections in the harness? follow it all the way up to the connection in your fuse box, make sure its all together. mine did the same thing after I swapped in my 6.0 and I had missed one little connection.

A new actuator shouldn't be $360, I bought one for around a bill and swapped it in myself, all you have to do is pull the skid plate and loosen it with some channel locks.

 

Did you blow a fuse?

 

Find someone that can read transfer case codes, it will save you lots of time.

 

I'm guessing the TCCM is in sleep mode still. There is I believe a reprogram for this. You can sometimes remove the power from it and power it back up to
wake it up. Otherwise if that doesn't work it will need to be replaced. Put a lot of encoder sensors in too.