I have a 2004 Blazer S-10 4WD, 4.3L V6, there are 3 pushbuttons on the dash- 2HI, 4HI, 4LO.
I want to change the transfer case oil, manual says Dexron III if 'electronic transfer case' and Auto Trak II if 'automatic transfer case'. Not sure which I have, getting conflicting info as I perform some Google searches, also getting conflicting info that Auto Trak II can be used in either flavor of xfer case. Can anyone tell me definitively what I haver, and what to use?

Thanks a million!

 

GM # 12378508 Auto Trak2 is best in my opinion, nice color too.

 

Dexron III is all that is required in the 3-button NV233 transfer cases. You will have no added benefits of running Autotrak 2 fluid other than a slightly lighter wallet.