I am trying to change the fluid in my differential. 'G80' is present in the glove compartment codes, meaning that I have a G80 differential. Attached here is my rear differential. Btw, this is on a 1999 Chevy S10 LS 4wd with the 4.3 V6
And also, would 75w-90 gear oil with no LS additives be okay to use?