Question about 2004 GMC Sierra

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2004 DuraMx dual cab oil pressure guage pegs ''6 o'clock'' running

When off, reads zero. Idles at 90 lbs. running pegs to 6 o'clock position. Does it need a new sending unit and if so where is it located?

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YES this is where I would start ALONG WITH A MANUAL PRESSURE TEST if Sending unit doesnt and Pressure test is GOOD ,Replace the Meter in Insrtament Cluster
I Have Pics but they will not show up in FixYa
The Oil Pressure sensor is on the Back of engine Looks like Left side 3 wire plug on 4.8L 5.3L 6.0L Can Email Pic with your Address

Posted on Jan 26, 2009

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My 2003 silverado is running 80 lbs.oil preasure what should i do


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MY OIL PRESSURE GUAGE PEGS HIGH WHEN THE TRUCK IS RUNNING. IT ALSO PEGS HIGH WHEN I JUST TURN THE KEY AND DONT START IT AND WHEN I TURN IT OFF IT GOES BACK TO ZERO. THANK YOU


Whats the make and model? Depending on what you are driving it sounds like either your oil filter is plugged up and you need an iol change, you have oil that is too thick in there, too much oil, or possably a clog in the oil pump or paths running to and from that area

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Should the oil pressure gauge fluctuate with speed


The oil pressure guage will fluctuate with engine RPM. At idle it should be approximately 20 lbs./sq.in, at high revs about 50-60 lbs./sq.in. Hope this helps any concerns you may have. Good luck!

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When my truck gets real hot the oil preasure guage starts bouncing when truck idles as soon as truck is put into park or is reved up a bit it stops bouncing


You may have a Faulty Oil Pressure Sender.
Here are some reason why your guage is bouncing:
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  • If the oil pressure gauge is pegged low after the engine is running, or is pegged high after the engine is running, or if there is intermittent illumination of an oil pressure indicator light, the sender could be faulty
You can find the oil sensor on the left hand side near the Oil Filter, as long as you don't hear your lifters ticking and making lots of noise. it's not your oil pump failing. 
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Check oil and check gauges light on


HEY,
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