PG01
Supporting Member
My 4wd unit was bottom facing rear of truck. Probably should be same for awd unit no?
What did you do to your NNBS GMT900 Tahoe/Yukon Today?
- Thread starter phattyford
- Start date
Disclaimer: Links on this page pointing to Amazon, eBay and other sites may include affiliate code. If you click them and make a purchase, we may earn a small commission.
gooffeyguy
Tom
I saw that but thought it was a mount due to the big washer area
Yes it does fool you. We are so used to have tiny ass fill holes not a gaping ass hole easy to fill so enjoy it LOL.
swathdiver
Full Access Member
It's that big one, A:
I just looked up the part numbers and GM says to use 75W90 synthetic now for the front as well. They used the same old ACDelco part number with a new GM part number and say we're to add the limited slip/locker friction modifier now (88900330)
So the new bottles say 10-4016/88900401.
PG01
Supporting Member
Oh fill plug…. Missed that part or read it as drain plug…. Meh such is life
it's the upper one
it's been in the same place since forever on all of them
just fill it until some spills out the hole and put the cap back on
gooffeyguy
Tom
I would have done this Saturday when I was doing the rear end, but wife texted me saying we were going out to dinner after she got home so I wanted to make sure I had time to take a shower and get cleaned up.
My manual says that both the front and rear axles take the same stuff. GM #89021677. I bought 5qts of Mobil1 Delvac 75w90 and have about a half qt left over after doing both.
My manual says that both the front and rear axles take the same stuff. GM #89021677. I bought 5qts of Mobil1 Delvac 75w90 and have about a half qt left over after doing both.
Last edited:
