JeffK

Thanks transfer case definitely has gear oil in it can smell it a mile away when I checked fluids. I assume I can just drain and refill with the Dexron VI?

I got a good deal mostly highway miles runs like new I have a 05 with 240+ on it.

I hope someone can set me straight as I just bought a 2015 Silverado 1500 Z71 and when checking the fluids I noticed the transfer case had gear oil in it. with 150k I know it is due for a change but wanted some opinions on what to use I can see GM 88861950 is a transfer case oil but the manual calls for Dextron VI. thanks for the guidance lost in Indiana.