I had the same 4WD error message - a new transfer case shift motor/encoder solved the problem in my case.

 

mmmm february

 

I never used. 4wd. Light came on any solution. I was told to drive. It. In all a 100. Feet

 

The service 4wd. Came. On. I have never use my 4wd drive

Any solution someone said. Drive in 4wd. For 100. FT

 

Hummer h3

 

Took Hummer to dealership, they fixed the service 4wd light and bill had been almost $3,000 to fix. Light is back on and having a hard time turning again. Coukd this be the transfer case, or is it something else?

 

What did they do to fix it, do you know?

If it's hard to turn, it sounds like you're in 4 Hi Locked. Do the LEDs above those buttons work?

Back when mine was running () I would occasionally get the "Service 4WD" warning but nothing obvious would stop working.

 

Unfortunately, I do not know exactly what they had fixed. My boyfriend had taken care of it all.
the lights are working. I've switched from 4wd hi to low locked and hi locked, I never hear anything when I switches from one to the other but I just assumed since the lights would change with the selections that obviously it was connected.
Before it had been fixed I could barely turn and would have to accelerate quite a bit to do so. Stopped at the grocery store yesterday after the light has came on a couple times and it's starting to bind again.
just wondering if I should take it back to the same dealer or sell the damn thing.

 

if they did the work and it is still under there repair warranty take it back. then you know your answer about selling or not

 

OH Yay!, dug up an OLD AS DIRT THREAD just to ask a question. How about skip the archaeology and fossil dig and just ask your question in a brand new thread?????