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
3 answers 3 comments
ANSWER by , September 12, 2013
check the control module for the tranfer case, fuses and or relays
COMMENT by , September 12, 2013
Module is new fuses are good. Where is the relay?
COMMENT by , September 12, 2013
where the actuators replaced, also known for faulty switch
COMMENT by , September 13, 2013
Yes everything is new
ANSWER by , 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!
ANSWER by , August 13, 2015
First, turn on key, put your foot on the brake, then put the trans in neutral (auto) or push clutch pedal to floor (standard trans). Then push & hold 2hi switch until light stays on. If that doesn't do it, take it in to a pro to scan for codes.