my 98 blazer 4dr lt is having 4wd problems. i replaced the tranny and everything worked fine. then 2wks later my 4x4 wouldnt come out of 4wd. so i looked and found a vacum hose that got burnt so i replaced it and worked for about a week and it came out of 4wd only if i unpluge the vacum hose under the hood. so now it wont engage at all just hear a clicking noise from the tccm. so i replaced that the vacum swith on top of the Tcase and the switch in the dash still nothing. what can cause this problem. need help need 4x4 for winter.

 

Hello 614blazer,

This person had a similar problem.
Try this link for some extra info.

https://blazerforum.com/forum/engine...problem-64043/

Mark