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Q: What causes my wheels to not be able to roll when I put in drive? on 1992 GMC Safari

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Won't drive forward nor backwards and brake pedal will hardly push
(2) Answers
If it is like this ALL the time even without engine running and brakes never release with NO pedal travel, suspect blockage in the brake fluid circuits, fluid cant return! Most likely the master cylinder needs to be replaced and system flushed. Fluid dirty, black in color? Have it checked out by a mechanic, not a diy repair, or do you know someone that is pretty car savvy and will help you out with some testing?
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