Tcase fluid. Dex VI or the special AC delco stuff?

[FL335i]

I'm going to be changing the fluid in my Tcase at my next oil change around 45k. I checked my owner's manual, specs Dec VI just like the Transmission. I thought there was some special GM fluid to use if you have the Auto 4WD, which I do have.

[DaveH71]

Your truck uses Dex VI. Just like your transmission.

 

Auto-trac is what you are thinking of and its blue. It was used in the gmt-800 body styles in the early to mid 2000's.

[txab]

Your truck uses Dex VI. Just like your transmission.

 

Auto-trac is what you are thinking of and its blue. It was used in the gmt-800 body styles in the early to mid 2000's.

 

+1

[LongrangeLauber]

Agreed with above

[FL335i]

Thank you guys. Who'd a thunk it. The O&M was correct. Still wanted to verify. I'm picking up 2qts of Valvoline Dex VI tonight.