4x4 Problem on my 2001 GMC Jimmy SLE

t_j_duskyt_j_dusky Member Posts: 5
edited March 2017 in GMC
Hello I'm new here and have a question about a 4x4 problem in my 2001 GMC Jimmy SLE. When i first bought the truck in April my 4x4 kept switching on and off while i was driving so i disconnected the vacuum line because i discovered it had a leak. In September i replaced and reconnected the line but now the vehicle won't go into 4x4. I checked the actuator and it's fine just wanted to know what everyone thinks the problem might be. I have a large shop and have worked on cars most of my life so i can fix it myself i just need to know what I'm supposed to be fixing. Any help would be greatly appreciated. Thanks in advance
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