1998 Chevy Tahoe Fluctuating Oil Pressure Guage

1998 CHEVROLET TAHOE
115,000 MILES • V8 • 4WD • AUTOMATIC
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TAHOEBOB02
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Why would my Oil Pressure guage start to flutuate from 0 - 60 PSI while driving? The Oil is full. Sometimes it will stay at 40PSI.

Is this also known as a Fuel Pump Oil Pressure Switch and Sender.
May 14, 2008 at 7:33 PM
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MASTERTECHTIM
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replace the oil pressure sending unit. this sends signal to th gauge and yours is bad
May 14, 2008 at 7:36 PM
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TAHOEBOB02
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[quote:7c36feec54="mastertechtim"]replace the oil pressure sending unit. this sends signal to th gauge and yours is bad[/quote:7c36feec54]Is this also known as a Fuel Pump Oil Pressure Switch and Sender.
May 14, 2008 at 8:39 PM
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PEAR69
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tahoebob02, The oil pressure sending unit is wired in series with the fuel pump. If the oil pressure drops to zero, the fuel pump will shut off, thus shuting off the engine. I never heared the oil pressure sending unit called the "fuel pump oil pressure switch and sender"--but I guess you could call it that....
May 15, 2008 at 5:04 AM