If you have the Auto4WD button, you NEED the Autotrak II fluid.

If you only have 3 buttons, you can use Autotrak II OR Dexron III

 

We just bought our first Trailblazer and it's been great. But, (being a rookie), I made a rookie mistake. I won't bore you with the details. Suffice it to say, I drained the transfer case and don't know how to refill it. If someone could help me with this, it would be great...as soon as you are done rolling around on the floor laughing.

Thanks much.

 

All you should need is a 3/8 inch ratchet it should be directly above your drain plug.
Next time look into a project or maintenance job before doing it it will save you much more time and less cursing.

 

Good advice. I appreciate the info.
All the best!