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which transfer case oil do you use?

128009 7
in my 2001 tahoe lt? it gives me 2 options in the chiltons manual.

-gm auto trak 2 transfer case fluid if i have the new venture 236 or 246 np8 case
-or dexron 3 atf for all others.

how do i know which transfer case i have? also if i do use dexron 3 atf. didn't they stop making it and i read dexron 6 isn't recommended to be used in replacement.
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· New Member
7,791 Posts
do you have "auto 4wd" as an option on the buttons? crawl under and look at the circular metal tag that may say "NP 246 2.72:1"
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