Welcome to HF.

I see you dug up two OLD AZZED threads to ask the same question. Couple pointers for ya. Do NOT dig up OLD threads, frowned on here. See:https://www.hummerforums.com/forum/n...bumping-23220/

Next, we welcome questions, but there is no need to ask in different locations or more than once.

You could have just made your own new thread and asked once.

Anyways...........
Year and Model always help when asking any question....

So your key doesn't turn when you put it in the lock???? Or does it turn but does nothing?

Did a prior owner have the ignition switch replaced?

 

If the key does not turn, when was the last time you lubricated the lock?? Might want to try that first.

Do NOT use WD40, that is a solvent, not a lubricant.

 

the key turns to the right but nothing happens. Can’t turn it to the left at all. I lost my fob and only have a key but still can’t get into my h3 2007. I need to call aaa?

 

Oh joy, digging up this same OLD as Dirt Thread again!

Did you even bother to lubricate the lock?