Rear Differential Fluid Change

[jakcol997]

Again, in the manual. What truck is this?

That’s all I got!

 

[George B]

It’s a 99 GMC Yukon 4door 4wd

75-90 full synthetic.

 

[jakcol997]

75-90 full synthetic.

Okay! My manual doesn’t say how much I need though.. any ideas?

 

[George B]

75-90 full synthetic.

I might have lied....
Looks like 1052271 is 80-90.

 

[George B]

You will need to buy three quarts.

 

[jakcol997]

I might have lied....
Looks like 1052271 is 80-90.

Haha okay! And yes to the additive or no?

 

[wjburken]

Haha okay! And yes to the additive or no?

Your manual says Do not add friction modifier.

 

[HiHoeSilver]

Your manual says Do not add friction modifier.

I saw that, too. I think thats because the Delco already has it in the formula.

 

[jakcol997]

Your manual says Do not add friction modifier.

I didn’t know if I go off the top or bottom one.. I’m still learning cars, so I didn’t know the second one applied to me!

 

[HiHoeSilver]

I didn’t know if I go off the top or bottom one.. I’m still learning cars, so I didn’t know the second one applied to me!

Your G80 is the locking differential. Do you have pushbutton 4wd or the handle on the floor by your seat?