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75gmc454 · 01-24-2011, 01:35 AM

Check the flexible rubber lines first. They are bad about collapsing. They look good on the outside but the inside breaks down from prolonged exposure to the brake fluid. That blocks the flow of fluid.

01-24-2011, 01:35 AM	#15
75gmc454 Registered User Join Date: Oct 2006 Location: MS Posts: 479	Re: Need help with 62 1/2 ton 4x4 burb brakes Check the flexible rubber lines first. They are bad about collapsing. They look good on the outside but the inside breaks down from prolonged exposure to the brake fluid. That blocks the flow of fluid.