Question about 2003 GMC Yukon Denali

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Whining noise in the drivetrain of 03 GMC Yukon Denali

It feels like the front end is heavy. Poor steering and lack of power. It whines until you let off the gas then it stops. Oil pressure shows a little lower at idle than normal. I have replaced both belt tensioners, both belts, idler pully, and alternator. Help!

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  • Anonymous Dec 30, 2008

    Vehicle makes grinding sound when gas pedal is pushed. no sound when pedal isn't pushed.

  • Anonymous Apr 21, 2009

    same problem when i push the gas it grinds when i let off it goes away on a 03 denali with all wheel drive

  • Glenn Snow May 11, 2010

    Is the power steering reservoir full and the front tire pressures up?

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6 Suggested Answers

n_c_713
  • 20 Answers

SOURCE: getting a high pitched whining sound that increases and decreases with accelleration and decelleration

it is your idler pulley. get it from dealer comes with bracket, just use pulley off bracket. take your belt off and your idler pulley is lower right hand side(facing your engine). 15mm bolt, replace pulley and reinstall your belt. it;s a common problem on trailblazers

Posted on May 05, 2009

  • 82 Answers

SOURCE: whines in reverse

some vehicles whine in reverse. My 1994 nissan did but was never an issue

Posted on May 05, 2009

  • 72 Answers

SOURCE: 2002 gmc yukon denali ac pump

it has gone bad replace it

Posted on Aug 07, 2009

  • 1 Answer

SOURCE: 2001 olds aurora whining noise

most think of the power steering pump going bad but most likely bearing in A/C pump going bad.

Posted on Jan 02, 2010

  • 1244 Answers

SOURCE: 02 yukon denali has a whining noise similar to bad wheel bearings

the jerking and noise you are experiencing is the drive chain and bearings in the transfer case also you may want to check the end play in both front and rear pinion bearings and yokes

Posted on Jan 22, 2010

bluebirdmate
  • 1190 Answers

SOURCE: 2005 Chevy trailblazer ext. engine whines

If the whine changes with engine speed in park it could be the idler pulley again or the alternator or waterpump or the a/c compressor you can use a stethoscope or a long narrow screwdriver (2') and put it against a non rotating part and put your ear against the other end and where the noise is the loudest should be the suspect part. Be careful of the fan and belt when doing this.

Posted on Sep 29, 2010

Testimonial: "It was the idler pulley. Sorry it took so long for me to add this post. Thanks for your help."

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I have a 2002 Denali pickup with quad-steer and the steering wheel is very hard to turn to the right. I have switched to 2 steer and have the same problem. Could it be the steer box or the pwr steering...


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