Piratehunter
I'm Awesome
just my preferences, when I replaced the oils in my '97 K2500 nv4500, g80, and transfer case, I used the GM/ACD recommended numbers. Some were more costly and harder to find, but I had time to get them. paid a bit more, but that was my preference to stick with factory spec ACDelco fluids. When I drained them all at 120K miles, they didn't have metal or look contaminated, so I figured if they've held up good for 120K, I'll stick with them. at the end of the day, I'm sure that most brands that are of the same spec will work just as well.