I have replaced everything except my transfer case and my 4x4 will not shift. on 1999 GMC Sierra 1500

My 4x4 is stuck in 4lo, replaced everything , what should I do next?

by in Missoula, MT on September 12, 2013
2 answers 3 comments
ANSWER by on September 12, 2013
check the control module for the tranfer case, fuses and or relays
COMMENT by on September 12, 2013
Module is new fuses are good. Where is the relay?
COMMENT by on September 12, 2013
where the actuators replaced, also known for faulty switch
COMMENT by on September 13, 2013
Yes everything is new
ANSWER by on September 12, 2013
What does a professional scanner say about this problem? Any codes for the transfer case?? It could actually be a mechanical malfunction inside of the case!