Question about 2002 GMC Sierra 2500HD

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2002 GMC 2500HD Duramax No power brakes or power steering My son drove home last night, and noticed the power brake pedal pressure was getting stiff. I went out today and found a total loss of power in both the brakes and the steering. Initially I thought it was just cold (it was -3 F when I woke up), but persisted after warming up. Fluid levels are o.k. and belt wear and tension are o.k. Got ideas? Let me know. Thanks

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You probably sheared the power steering pump shaft. The same thing happened to my 01 GMC 2500HD, no leaking from the pump or any hoses; but no power brakes or steering. I just replaced the pump and re-seated it in the old reservoir for 40 bucks but looking back I would have just spent 50-60 on a pump that came with the reservoir allready attached because now I have a annoying slow leak. Good luck.

Posted on Jan 29, 2009

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Hello, It sounds like your hydra-boost has gone out. The hydra-boost is under the hood on the drivers side firewall. Diesel engines don't have manifold vacuum so the power steering pump supplies pressure to the brakes.You can purchase rebuilt units for about half of what a new one costs.

Posted on Jan 02, 2009

  • David Robinson Jan 03, 2009

    Is there power steering fluid leaking from the hydra boost unit? Does the brake petal "kick back" at your foot when you push it?

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First check the break oil level.

Posted on Jan 02, 2009

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Sir,

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thanks
good luck

Posted on Jan 02, 2009

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It HAS to be a linkable fuse problem since the pressure sending unit is mechanical in nature usually. Take a CLOSE look at all linkable fuses that could be related to both systems. Look at the fuse box under the hood and under the dash if applicable. This should help.

Posted on Jan 02, 2009

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