2003 Hummer H2 Oil pressure dropping intermittently

2003 HUMMER H2
160,000 MILES • V8 • 4WD • AUTOMATIC
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JCTX09
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  • 1 POST
I have a problem with my oil pressure. When I first drive the vehicle, my oil pressure is fine. After a while, (it could be 5 minutes or 2 hours but usually between 15 and 30 minutes), the oil pressure will quicly drop and I have to stop the vehicle, of course. I can let it sit there for a few minutes and then turn it back on and drive it again for a while, up to a few hours sometimes.

The repair shop recommened flushing the oil and this did help because before this I couldn't keepy any pressure up for more than few minutes. What would my next step need to be? Is this due to clogged up passageways through the block or a problem with the oil pump or pan? Any help is appreciated.

Thank you
Jan 4, 2010 at 10:04 AM
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RASMATAZ
  • ✓ASE Certified Mechanic
  • 75,992 POSTS
  • ASE Certified Mechanic
Check the oil pressure with a mechanical gauge if normal replace the oil pressure switch abnormal could mean oil pump and engine bearings-
Jan 4, 2010 at 11:15 AM
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