• Tiny
  • bruinak
  • 2003 GMC Sierra

Steering problem
2003 GMC Sierra V8 Four Wheel Drive Automatic 110000 miles

My truck is a 2003 GMC 3/4 ton Duramax Diesel 4x4. After driving the truck for 2 or more hours at 70 mph or more, the power steering starts making a whining noise. After 4 hours, the fluid starts boiling over from the reservoir. This happened right after I had the system flushed. The pump and a hose were replaced, but the problem persists. Previously, there was also a whining noise which we thought was coming from the steering column, but has stopped since this new problem surfaced. Transmission fluid was used in power steering when it initially boiled over, and the system has been flushed again since the pump was replaced. Then generic power steering fluid was used after a subsequent boil over.

Wednesday, June 24th, 2009 AT 9:39 AM

1 Answer

  • Tiny
  • Docfixit
  • Expert
  • 18,991 posts

Whine and boil over after flush check steering fluid cooler debris probably got into cooler reducing flow And heating fluid to boiling point.
Let me know
Thanks for donate

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Wednesday, June 24th, 2009 AT 11:19 AM

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