Question about 2000 GMC Sierra
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!
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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Posted on Jan 02, 2017
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