2003 Cadillac Escalade Ext whine

2003 CADILLAC ESCALADE EXT
70,500 MILES • V8 • FWD • AUTOMATIC
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BELLEZZA206
  • MEMBER
  • 1 POST
the truck whines when i accellarate and when i hit the brakes
Apr 15, 2009 at 6:38 AM
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FACTORYJACK
  • ✓ASE Certified Mechanic
  • 4,159 POSTS
  • ASE Certified Mechanic
Does the whine occur when you are stationary? Bring the speed up, and press the brake hard. It is a hydro-boost type brake booster that relies on P/S pump pressure. If your fluid is low, or pump is becoming faulty, a whine could occur. If it is accelerating/decelerating whine, that only occurs with vehicle speed, you could have some scored front differential side bearings as well.
Apr 16, 2009 at 10:06 PM
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