2003 GMC Yukon Oil Pressure Sending Unit Gauge Fluctuates

Tiny
JAYRICHARD
  • MEMBER
  • 2003 GMC YUKON
Electrical problem
2003 GMC Yukon Four Wheel Drive Automatic 88753 miles

My vehicle just recently started acting funny with the oil pressure gauge. (I think thats what it is). Now when I turn the car on the it goes to 40 but when I drive a little faster it will immediately go up and sometimes gradually come back down to close to 40. I get the oil change every 2000miles, and this just started happening maybe about 2wks ago. Is there something wrong with the Cluster Sensor?
Sunday, August 22nd, 2010 AT 12:01 AM

9 Replies

Tiny
RASMATAZ
  • MECHANIC
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For what engine? 4.8L, 5.3L & 6.0L
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Sunday, August 22nd, 2010 AT 12:43 AM
Tiny
JAYRICHARD
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I think its a 6.0
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Sunday, August 22nd, 2010 AT 1:36 AM
Tiny
RASMATAZ
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Engine Oil Pressure (EOP) Sensor (6.0L VIN U)On top rear of engine
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Sunday, August 22nd, 2010 AT 1:39 AM
Tiny
JAYRICHARD
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But do you know what the sudden fluctuation with the guage is?
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Sunday, August 22nd, 2010 AT 2:07 AM
Tiny
RASMATAZ
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Could be the oil pump on its way out-to find out hook up a mechanical gauge and read the oil pressure
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Sunday, August 22nd, 2010 AT 2:11 AM
Tiny
JAYRICHARD
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Should I drive it or park it?
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Sunday, August 22nd, 2010 AT 2:11 AM
Tiny
RASMATAZ
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Its probably just the oil pressure switch out of calibration-Do you hear any type of engine knocking noises? If not-your shot with the switch
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Sunday, August 22nd, 2010 AT 2:22 AM
Tiny
JAYRICHARD
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Nothing is knocking. The truck sounds the exact same from when I first got it. It drives smooth and everything. Its just that guage thats making me nervous. It will go past 40 but a few seconds later it will go back to normal. It doesn't go low on pressure either.
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Sunday, August 22nd, 2010 AT 3:22 AM
Tiny
RASMATAZ
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You got nothing to worry about as long as when it reaches 60psi it drops indicating the oil pump pressure relief valve is opening.
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Sunday, August 22nd, 2010 AT 3:44 AM

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