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Why is truck making a whining type sound that stops when the gas is applied

Tiny
JACKHODGE
  • MEMBER
  • 1991 CHEVROLET CHEYENNE
  • 180,000 MILES
The sounds also changes slightly when I turn the wheel. It may be unrelated but it also makes similar sounds while in reverse.
Wednesday, September 26th, 2012 AT 12:38 AM

5 Replies

Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
It might be a powersteering pump. Have a pro look at it they normally don't charge for an opinion.
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Wednesday, September 26th, 2012 AT 12:39 AM
Tiny
JACKHODGE
  • MEMBER
  • 12 POSTS
Thank you for such a quick reply. What problems could I face if the power steering fails completely?
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Wednesday, September 26th, 2012 AT 12:45 AM
Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
Will be hard to turn at slowspeeds and parking.
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Wednesday, September 26th, 2012 AT 12:47 AM
Tiny
JACKHODGE
  • MEMBER
  • 12 POSTS
I've heard that it could effect my braking power or cause brake failure. Is that true?
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Wednesday, September 26th, 2012 AT 12:50 AM
Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
It wold only do that if you had a hydraulic unit for a braek booster and I don't think in 91 that was done yet. If you have a hydraulic instead of vacuum brake booster then it would if hte pump failed.
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Wednesday, September 26th, 2012 AT 2:16 PM

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