Question about 2000 GMC Sierra

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2000 gmc both rear tire oil leakage.

Both rear tires are dripping oil on my 2000 gmc work truck 3500, the brake re savior has plenty of oil, no drop in fluid, this is a black fluid and not a brake fluid drippage I think!

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  • rlukay3 Sep 18, 2008

    wow, I didn't think about the axle seals, thanks so much and I will have that checked out!

    Thanks again countrycurt0


  • Anonymous Mar 23, 2014

    no brake fluid out of abs module to rear brakes is there a way to bypass system

  • Anonymous Mar 28, 2014

    Why is brake fluid not going to rear brakes on my 2000 Toyota solara

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You are correct, it's not brake fluid. Check the level in your rear axle, it sounds like you have bad seals in the axles allowing the rear differential gear oil to leak inside the brake drums.
This is a heavy weight oil, 80 or 90 weight. This leakage will ruin your brake pads, and if enough leaks out, your rear differential will blow. The seals aren't expensive, but it's a lot of labor to pull everything apart to get at the seals, plus new rear brakes. My Ford ( and I'm sure your GMC) require removal of the rear axles to change the seals. Good Luck! countrycurt0

Posted on Sep 18, 2008

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