Suburban differential fluid amounts

[Pruittx2]

On my 1995 Suburban,, How much gear oil do I need to buy for both diff's? Rear is a Non floater with 3:42 and I think it's a tick more than 3 qts but how much for the front?
I've got 3 qts Royal Purple tranny fluid to do the transfer case. and want to do them all while under there. All the info I find is for Dmax.

 

[Suburbank2500]

Hi


Do you have the LS rear axle

 

[Pruittx2]

LS= Limited Slip,, or G80 YES