2004 GMC Sierra OIL PRESSURE

80,000 MILES • 6 CYL • 2WD • AUTOMATIC
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ZYNSTAR
  • MEMBER
  • 1 POST
Oil gauge is flunctuating . When driving gauge shows 40-45 , but when slowed down or at a stop , the gauge is 20-25 & sometimes 15-20 . Then when speeding up gauge goes back to 40-55 . If let off gas , goes down to 30 & back to 45 when back on gas . Oil sender unit has been replaced , but stiil acting the same . No noises from engine , & no real changes in how the motor runs . Seems to run ok . Would appreciate any info that might help . Thanks *
Jun 4, 2010 at 6:31 PM
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RASMATAZ
  • ✓Experienced Mechanic
  • 75,988 POSTS
Check the oil pressure with a mechanical gauge,if normal replace the oil pressure switch.If abnormal could mean oil pump and/or engine bearing.
Jun 4, 2010 at 7:44 PM
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