Question about 1995 GMC Jimmy

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95 GMC Jimmy brakes are tight

Hi everyone!

Just today I have been having an issue with my brakes on my 95 GMC Jimmy. I went to park the car and the brakes became very tight, almost rock hard. I could hardly press it down. It has only been happening for today. I have checked the brake fluid and it has plenty. I did some research online and I found it could be a problem with the Master Cylinder. Would bleeding the brakes relieve this issue? Or is this a sign of a bigger problem that I need to take into the shop? I would appreciate any suggestions!


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  • GMC Master
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The hard brake pedal is most likely a faulty power brake booster. Unless you suspect a faulty master cylinder, buy one with out it. In fact, if you suspect any other problems which might require opening the brake system (the booster does not) take it to a mechanic for repair. 

The brake booster will require removal of four bolts on the fire wall (from the inside of the truck) and the removal of the master cylinder (do not remove the brake lines, simply unbolt it from its mooring). You will also have to muck about with the connecter for the pedal rod. If you feel at all unsure about doing that job, have a mechanic do it.

Good luck and hope this helps.

Posted on May 08, 2009

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