2000 GMC Truck oil pressure gauge

2000 GMC TRUCK
133,335 MILES • 4 CYL • 2WD • MANUAL
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STEVER1963
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  • 1 POST
my oil pressure gauge drops then rises after switching gears in first and second but stays at 3/4 in 3rd and 4th
Oct 3, 2009 at 7:02 AM
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RASMATAZ
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  • 75,992 POSTS
Check the oil pressure with a mechanical gauge if normal replace the oil pressure switch abnormal reading could be the oil pump and engine bearings
Oct 3, 2009 at 10:15 AM