Here goes again:
I have a similar problem.
1998 Tahoe (on small island of Guam so parts are hard to come by).
I use 4x4 allot getting boat out of the water. It was working fine until last week when it stopped working.
After reading your thread, I found that my #2 fuse was also blown. I replaced an 4x4 worked immediately - once. Now I blow a fuse every time I replace the fuse and the engage the 4x4!
I've just let the truck in 4x4 mode and so far haven't blown any more fuses and the 4x4 is working. The problem seems to arise when I switch out of 4x4 and back in.
I'm also pulling a trailer that is submerged in saltwater. All the lights work and it was not causing a problem before - but could be a short?
Help?
Thursday, January 3rd, 2019 AT 2:27 PM