Oil Pressure Sensor
Testing
4.8L, 5.3L & 6.0L Engines
Using J 41712 or equivalent, remove the oil pressure sensor.
To install:
Testimonial: "thankj you. good explanation,diagram was helpful. Mike"
If the sensor is working properly, might just be a bad gauge.
This is unfortunately a known issue GM vehicles. I do want to let you know that we at The Electronics Guru LLC., offer a solution to repair your gauge/gauges for a QUARTER of the dealer's price! If you or anyone else you know has a defective gauge, I highly recommend looking at our website. www.UrGaugeRepairGuy.com Please don't hesitate to ask if you have anymore questions.
Thanks,
Kevin
The Electronics Guru
www.UrGaugeRepairGuy.com
SOURCE: In my 02' Trailblazer oil pressure gauge goes below 0
I suspect its your pigtail connection...I have the same problem and doubt seriously that it is the pump. The mechanic would gladly take your money especialy for a pump change job.
SOURCE: oil pressure gauge is reading 80 psi. I had the
The oil sending unit is located on the engine block behind the drivers cylinder head area.You have to climb up on the motor to see it cause it is hard to see behind the wiring harness.You may also want to purchase a new sending unit because it is very long and you might need to buy the sending unit socket to replace it.Hope this helps.Good luck.
SOURCE: OIL PRESSURE LIGHT COMES ON AND PRESSURE GOES TO 0 ON GAUGE
Any time the oil pressure is 0 you take a chance of locking up the motor. The only way to know for sure is to put a pressure gauge in the oil pressure sending unit port on the engine and see what the pressure really is. At that point you will either have the peace of mind in the knowledge that the sending unit is really bad and needs replacement or you can then contact a repair shop and tell them what your testing has revealed. I wouldn't drive or run your truck while the oil pressure is at zero.
Good luck
SOURCE: 2004 GMC Sierra High Oil Pressure
if it is electrical oil pressure sensor I would start there. The best way to see if you have a major problem is to use a mechanical oil pressure tester. Take off the oil pressure sensor and put the mechanical tester on. The tester should come with a Gage. If it comes within your trucks oil pressure range than all is fine and replace the sending unit and see if that don't help your problem.If the tester runs high then the oil pump is bad or your cam-bearings could be the problem. But with cam-bearings you would usually get a low reading.
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