I am really frustrated that my diff lock is stuck in Hi as I can't us my SLS system to raise and lower for trailer connect. (don't have sls fob)
Many threads talk about them being corroded or gunky. I have been using this multiple times a month both on and off trail sense purchase Sept. 2006.
What would cause it to seize abruptly?

 

Your diff lock, in no way, can can cause your SLS yo not work.
What year is your truck?
Hook up your trailer the old fashion way, lift up the tongue and drop it on the ball, it is good for your back.

 

do the D2's have the same solenoid on the transfer case as the D1's? thats what was wrong with mine and caused it to not engage low no matter how hard i tried...

 

I drive a 2001 SE7. I suppose my real issue is I don't know how to fix the stuck diff lock. Does anyone have a step by step list or even better pictures of what to do?

Once the low range is operational again the raising and lowering of the SLS's system will work again. The leveling of the SLS works wonderfully, which it should I bought and installed new air springs last year.

 

1st, make sure you're doing one of the following when shifting the CDL:

1. Slowly rolling in neutral.

2. Sitting still in neutral but pushing slightly on the accelerator.

 

For whatever reason you seem to be confused, the diff lock does not in ANT way have any thing to do with your SLS. So unless some one screwed up at the factory and really messed up your wiring, you need to hear what I am saying, there is no connection.
So, are you thinking your shift solenoid has failed on your t/case, will it not allow you to shift into low range, if so, you can either replace it or remove it complete and being a saftey device, you can get along without it.
Have you ever removed one before?

 

Mike I appreciate you setting me straight you seem to be the VOICE of repair on many sites that is a great civil service.
I am new in the Landy repair world and terminology is causing some confusion.
I do have a CDL but not hooked up to a lever. (have used to have prop shaft rebuilt)
So yes I am unable to shift from Hi to Low range.
No I have not removed a solenoid before. This is my first real 4x4. (prior was an 89 Toyota Vanwagon push button 4wd)
I am rather savvy with cars, though most of my wrenching was in rebuilding & maintaining two Classic Saab 900's and the Toyota Van.
So any advice would be helpful/needed.
Thanks

 

Send me your tele number and I can walk you thru the solenoid issue.

 

yeah i think its just the solenoid, its a pain to get to but pretty easy to do in an afternoon... the SLS is a completely different issue all together...