after 40 mins or so oil pressure gauge will drop to 0.

2004 CHEVROLET SILVERADO
60,000 MILES
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JOHNB
  • MEMBER
  • 1 POST
After about 40 mins or so oil pressure will drop to 0. turn off truck and check oil. checks good turn truck back on no problem pressure back up. have changed sending unit. changed and flushed/ cleaned oil. afted driving awhile on 0 sometimes climbs back up but drops again
Apr 7, 2012 at 10:05 PM
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RASMATAZ
  • ✓ASE Certified Mechanic
  • 75,992 POSTS
  • ASE Certified Mechanic
-Could be the oil pump failing or excessive engine bearing clearances-check oil p/u screen
Apr 7, 2012 at 10:19 PM
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