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Diff Fluid Change

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by KapeKodK5, Apr 17, 2000.

  1. KapeKodK5

    KapeKodK5 Registered Member

    Mar 3, 2000
    Likes Received:
    Today I am going to change my diff fluid in the rear. Two questions. One seeings how I don't have a factory manual, where is the fill plug once I get the cover back on? And 2 the guy at the auto parts store sold me 80W90 is this the right fluid. I have a '90 by the way if it makes a difference....Thanks
  2. Blazer1970

    Blazer1970 1/2 ton status

    Feb 17, 2000
    Likes Received:
    Old Mission, MI
    Yes, 80W90 is the right stuff. If I recall right, the fill plug on a 10 bolt is on the front passenger side of the diff. case. Just fill it up until it starts running out the fill hole.


    1970 Blazer CST 4X4 350 SM465 NP205
    1987 Suburban 4X4 350
    1988 Chevy Pickup 4X4 350

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