2000 Oldsmobile Bravada

Help!!!!! Front differential is not engaging, The Haynes manual does not give any specifics on the Bravada as opposed to the S-10. Are both systems activated by vacuum at the frame and the tranfer case? Any help would be greatly appreciated............:smile:

Front axel is vacuum and electric controlled.
What transfer case?
http://www.automotiveforums.com/vbulletin/showthread.php?t=572914
There is a how to in the how to section by Muddog.