Transfer Case Fluid?

[ss444]

I have found two types of fluid to use for the '99 Yukon.
Dexron-III for the manual and GM # 12378396 for the auto shift.
I have the auto, what does anyone recommend. I would like to
service the case before I start using the 4X4 on the beach.
Thanks!

 

[ss444]

I have found two types of fluid to use for the '99 Yukon.
Dexron-III for the manual and GM # 12378396 for the auto shift.
I have the auto, what does anyone recommend. I would like to
service the case before I start using the 4X4 on the beach.
Thanks!

Should have done this first!
Did a search in the TECH area, found my answer in the "Drive Line CLUNK & FIX" thread,
will be using GM Auto TracII (blue).

 

[Jazz]

There's a sticker on the bottom. Mine says Dex 3 and I'm auto..

 

[ss444]

I'll have to take a look....thanks!